us-gaap |
Dividends Payable |
Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. |
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|
us-gaap |
Earnings Per Share, Basic |
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. |
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|
us-gaap |
Treasury Stock, Common, Shares |
Number of previously issued common shares repurchased by the issuing entity and held in treasury. |
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|
us-gaap |
688588 |
None |
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|
us-gaap |
Deferred Tax Asset, Interest Carryforward |
Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible interest carryforward. |
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|
us-gaap |
Dividends Payable, Amount Per Share |
The per share amount of a dividend declared, but not paid, as of the financial reporting date. |
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|
us-gaap |
Lessee, Operating Lease, Liability, to be Paid |
Amount of lessee's undiscounted obligation for lease payment for operating lease. |
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|
us-gaap |
Stock Issued During Period, Shares, Acquisitions |
Number of shares of stock issued during the period pursuant to acquisitions. |
View
|
dei |
Entity Public Float |
The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter. |
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|
srt |
Extensions, Discoveries, Additions and Improved Recovery, Less Related Costs |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of extensions, discoveries and improved recovery of proved oil and gas reserves. |
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|
srt |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Cash Inflows |
Amount of estimated future accumulated cash inflow from the sale of proved oil and gas reserves. |
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|
srt |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Development Costs |
Amount of estimated future accumulated cash outflow for costs to be incurred in developing proved oil and gas reserves. |
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|
srt |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Income Tax Expense |
Amount of estimated future accumulated cash outflow for income tax, based on the future income less future expense derived from production and sale of proved oil and gas reserves. |
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|
srt |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Net Cash Flows |
Amount, after future accumulated cash outflow for development and production costs and future income tax, of estimated future accumulated cash inflow from the sale of proved oil and gas reserves. |
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|
srt |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Production Costs |
Amount of estimated future accumulated cash outflow for costs to be incurred in producing proved oil and gas reserves. |
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|
srt |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Ten Percent Annual Discount for Estimated Timing of Cash Flows |
Amount of discount on future accumulated cash inflow, after deducting future accumulated cash outflow for development and production costs and future income tax, from sale of proved oil and gas reserves, using a discount rate of ten percent a year. |
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|
srt |
Changes in Estimated Future Development Costs |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of change in estimated future development costs. |
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|
srt |
Changes in Future Income Tax Expense Estimates on Future Cash Flows Related to Proved Oil and Gas Reserves |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of change in the estimated future income tax on future pretax net cash flows related to the entity's proved oil and gas reserves. |
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|
srt |
Net Increase (Decrease) in Sales and Transfer Prices and Production Costs |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of change in sales and transfer prices and in production (lifting) costs related to future production. |
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|
srt |
Oil, Productive Well, Number of Wells, Gross |
Number of producing oil wells and oil wells capable of production with working interest ownership. |
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|
srt |
Proved Developed and Undeveloped Reserve, Extension and Discovery (Energy) |
Energy measure of increase in quantity of proved reserve of oil and gas resulting from the extension of the proved acreage of previously discovered reservoir or discovery of new field with proved reserve or of new reservoir of proved reserve in old field, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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srt |
Proved Developed and Undeveloped Reserve, Net (Energy) |
Energy measure of proved reserve of oil and gas, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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|
srt |
Proved Developed and Undeveloped Reserve, Production (Energy) |
Energy measure of decrease in quantity of proved reserve of oil and gas resulting from production, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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|
srt |
Proved Developed and Undeveloped Reserve, Revision of Previous Estimate (Energy) |
Energy measure of increase (decrease) in quantity of proved reserve of oil and gas related to revision of a previous estimate resulting from new information, except for an increase in proved acreage, or change in economic factors, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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|
srt |
Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Other |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of changes from other sources. |
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|
srt |
Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves, Accretion of Discount |
Amount of accretion of discount for the standardized measure of discounted future net cash flow related to proved oil and gas reserves. |
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srt |
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves |
Amount of discounted future accumulated cash inflow relating to proved oil and gas reserves. |
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|
srt |
Proved Developed and Undeveloped Reserves, Sale of Mineral in Place (Energy) |
Energy measure of decrease in quantity of proved reserve of oil and gas resulting from sale of mineral in place, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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us-gaap |
Accounts Payable, Current |
Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Accounts Receivable, after Allowance for Credit Loss, Current |
Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. |
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|
us-gaap |
Accretion of Discount (Deprecated 2016-01-31) |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of passage of time. |
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|
us-gaap |
Accrued Income Taxes, Current |
Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations. |
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|
us-gaap |
Additional Paid in Capital, Common Stock |
Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital. |
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|
us-gaap |
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition |
Amount of increase to additional paid-in capital (APIC) for recognition of cost for restricted stock unit under share-based payment arrangement. |
View
|
us-gaap |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition |
Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement. |
View
|
us-gaap |
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities |
The sum of adjustments which are added to or deducted from net income or loss, including the portion attributable to noncontrolling interest, to reflect cash provided by or used in operating activities, in accordance with the indirect cash flow method. |
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|
us-gaap |
Share-based Payment Arrangement, Expense |
Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. |
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|
us-gaap |
Accounts Receivable, Allowance for Credit Loss |
Amount of allowance for credit loss on accounts receivable. |
View
|
us-gaap |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. |
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|
us-gaap |
Asset Impairment Charges |
Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. |
View
|
us-gaap |
Asset Retirement Obligation, Accretion Expense |
Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. |
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us-gaap |
Asset Retirement Obligation, Liabilities Incurred |
Amount of asset retirement obligations incurred during the period. |
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|
us-gaap |
Asset Retirement Obligation, Liabilities Settled |
Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. |
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|
us-gaap |
Asset Retirement Obligation, Revision of Estimate |
Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. |
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|
us-gaap |
Asset Retirement Obligations, Noncurrent |
Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. |
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|
us-gaap |
Assets |
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. |
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|
us-gaap |
Assets Held-for-sale, Not Part of Disposal Group, Current |
Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer. |
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|
us-gaap |
Business Acquisition, Cost of Acquired Entity, Cash Paid (Deprecated 2013-01-31) |
Amount of cash paid to acquire the entity. |
View
|
us-gaap |
Business Acquisition, Pro Forma Net Income (Loss) |
The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. |
View
|
us-gaap |
Business Acquisition, Pro Forma Revenue |
The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. |
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|
us-gaap |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |
This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. |
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us-gaap |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |
This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. |
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|
us-gaap |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage |
Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination. |
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|
us-gaap |
Capitalized Costs, Accumulated Depreciation, Depletion, Amortization and Valuation Allowance Relating to Oil and Gas Producing Activities |
Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities. |
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|
us-gaap |
Capitalized Costs, Mineral Interests in Unproved Properties |
Capitalized costs of unproven properties that include fee ownership or a lease, concession, or other interest representing the right to extract oil or gas subject to such terms as may be imposed by the conveyance of that interest. |
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|
us-gaap |
Capitalized Costs, Oil and Gas Producing Activities, Gross |
The sum of capitalized costs relating to oil and gas producing activities before accounting for accumulated depreciation. |
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|
us-gaap |
Capitalized Costs, Oil and Gas Producing Activities, Net |
Net amount of capitalized costs relating to oil and gas producing activities. |
View
|
us-gaap |
Capitalized Costs, Proved Properties |
Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. |
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|
us-gaap |
Capitalized Costs, Unproved Properties |
Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table. |
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|
us-gaap |
Cash and Cash Equivalents, at Carrying Value |
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. |
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us-gaap |
Cash and Cash Equivalents, Period Increase (Decrease) |
Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. |
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|
us-gaap |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations |
Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. |
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|
us-gaap |
Deferred Income Tax Liabilities, Net |
Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting. |
View
|
us-gaap |
Deferred Revenue, Current |
Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current. |
View
|
us-gaap |
Deferred State and Local Income Tax Expense (Benefit) |
Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations. |
View
|
us-gaap |
Collateral Securities Repledged, Delivered, or Used |
The carrying value as of the balance sheet date of securities received as collateral from a counterparty that were re-pledged, sold, delivered or otherwise reused by the entity. |
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|
us-gaap |
Common Stock, Dividends, Per Share, Cash Paid |
Aggregate dividends paid during the period for each share of common stock outstanding. |
View
|
us-gaap |
Common Stock, Dividends, Per Share, Declared |
Aggregate dividends declared during the period for each share of common stock outstanding. |
View
|
us-gaap |
Common Stock, Par or Stated Value Per Share |
Face amount or stated value per share of common stock. |
View
|
us-gaap |
Common Stock, Shares Authorized |
The maximum number of common shares permitted to be issued by an entity's charter and bylaws. |
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|
us-gaap |
Common Stock, Shares, Issued |
Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. |
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|
us-gaap |
Common Stock, Shares, Outstanding |
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. |
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|
us-gaap |
Common Stock, Value, Issued |
Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. |
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us-gaap |
Concentration Risk, Percentage |
"For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the ""benchmark"" (or denominator) in the equation, this concept represents the concentration percentage derived from the division." |
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|
us-gaap |
Contract with Customer, Performance Obligation Satisfied in Previous Period |
Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price. |
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|
us-gaap |
Costs and Expenses |
Total costs of sales and operating expenses for the period. |
View
|
us-gaap |
Costs Incurred, Acquisition of Oil and Gas Properties |
Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties. |
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|
us-gaap |
Costs Incurred, Development Costs |
Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities. |
View
|
us-gaap |
Costs Incurred, Exploration Costs |
Exploration costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities. |
View
|
us-gaap |
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities |
Amount of costs incurred related to oil and gas property acquisition, exploration and development activities, including capitalized costs and costs charged to expense. |
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|
us-gaap |
Current Federal Tax Expense (Benefit) |
Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. |
View
|
us-gaap |
Current Income Tax Expense (Benefit) |
Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. |
View
|
us-gaap |
Current State and Local Tax Expense (Benefit) |
Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. |
View
|
us-gaap |
Deferred Compensation Arrangement with Individual, Compensation Expense |
The compensation expense recognized during the period pertaining to the deferred compensation arrangement. |
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|
us-gaap |
Deferred Compensation Arrangement with Individual, Recorded Liability |
The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit. |
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|
us-gaap |
Deferred Compensation Arrangement with Individual, Shares Issued |
Number of shares issued pursuant to the terms of a deferred compensation arrangement. |
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|
us-gaap |
Deferred Federal Income Tax Expense (Benefit) |
Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. |
View
|
us-gaap |
Deferred Income Tax Assets, Net |
Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting. |
View
|
us-gaap |
Deferred Income Tax Expense (Benefit) |
Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. |
View
|
us-gaap |
Deferred Tax Liabilities, Gross |
Amount of deferred tax liability attributable to taxable temporary differences. |
View
|
us-gaap |
Deferred Tax Assets, Gross |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. |
View
|
us-gaap |
Deferred Tax Assets, Net |
Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. |
View
|
us-gaap |
Deferred Tax Assets, Net of Valuation Allowance |
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. |
View
|
us-gaap |
Deferred Tax Assets, Net of Valuation Allowance, Current |
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as current. |
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|
us-gaap |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. |
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|
us-gaap |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards. |
View
|
us-gaap |
Deferred Tax Assets, Other |
Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. |
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|
us-gaap |
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs. |
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|
us-gaap |
Deferred Tax Assets, Tax Deferred Expense, Other |
Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from provisions, reserves, allowances, and accruals, classified as other. |
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|
us-gaap |
Deferred Tax Assets, Valuation Allowance |
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. |
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|
us-gaap |
Deferred Tax Liabilities, Net |
Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. |
View
|
us-gaap |
Deferred Tax Liabilities, Net, Current |
Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as current. |
View
|
us-gaap |
Deferred Tax Liabilities, Deferred Expense |
Amount of deferred tax liability attributable to taxable temporary differences from capitalized costs. |
View
|
us-gaap |
Deferred Tax Liabilities, Derivatives |
Amount of deferred tax liability attributable to taxable temporary differences from derivatives. |
View
|
us-gaap |
Deferred Tax Liabilities, Net, Noncurrent |
Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. |
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|
us-gaap |
Depreciation, Depletion and Amortization |
The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. |
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|
us-gaap |
Derivative Asset, Fair Value, Gross Liability |
Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. |
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|
us-gaap |
Derivative Asset |
Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. |
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|
us-gaap |
Derivative Asset, Current |
Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. |
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us-gaap |
Derivative Assets (Liabilities), at Fair Value, Net |
Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. |
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us-gaap |
Derivative Asset, Noncurrent |
Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. |
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|
us-gaap |
Derivative Asset, Fair Value, Gross Asset |
Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. |
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us-gaap |
Derivative Liability, Fair Value, Gross Liability |
Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. |
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us-gaap |
Derivative Liability, Fair Value, Amount Offset Against Collateral |
Fair value, after effects of master netting arrangements, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against the right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset. |
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us-gaap |
Derivative, Gain (Loss) on Derivative, Net |
Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. |
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us-gaap |
Derivative Liability |
Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. |
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|
us-gaap |
Derivative Liability, Noncurrent |
Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. |
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us-gaap |
Derivative Liability, Fair Value, Gross Asset |
Fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. |
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us-gaap |
Development Wells Drilled, Net Productive |
The number of productive developmental wells drilled in the geographic area. A productive well is a well that is not a dry well. The number of wells drilled refers to the number of wells (holes) completed at any time during the fiscal years, regardless when drilling was initiated. |
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us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, 10 Percent Annual Discount for Estimated Timing of Cash Flows (Deprecated 2014-01-31) |
This is the amount that is derived from using a discount rate of ten percent a year to reflect the timing of the future net cash flows relating to proved oil and gas reserves. |
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|
us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Cash Inflows (Deprecated 2014-01-31) |
Amount of estimated future cash inflows from sale of proved oil and gas reserves. |
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|
us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs (Deprecated 2013-01-31) |
The future cost of developing oil and gas from proved reserves located in this geographic region. |
View
|
us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Development Costs (Deprecated 2014-01-31) |
Amount of estimated future cost to be incurred in developing proved oil and gas reserves. |
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|
us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Income Tax Expense (Deprecated 2013-01-31) |
The estimated future income tax expenses that will be incurred based on the future income less future expenses derived from production and sale of proved oil and gas reserves in this geographic region. |
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us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Income Tax Expense (Deprecated 2014-01-31) |
Amount of estimated future income tax expense to be incurred based on the future income less future expense derived from production and sale of proved oil and gas reserves. |
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us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Net Cash Flows (Deprecated 2014-01-31) |
Amount of estimated net future cash inflows, after subtracting future development and production costs and future income tax expenses, from sale of proved oil and gas reserves. |
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us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Production Costs (Deprecated 2013-01-31) |
The future cost of producing oil and gas from proved reserves located in this geographic region. |
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us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Future Production Costs (Deprecated 2014-01-31) |
Amount of estimated future cost to be incurred in producing proved oil and gas reserves. |
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us-gaap |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Standardized Measure (Deprecated 2014-01-31) |
This amount is the future net cash flows less the computed discount. |
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us-gaap |
Dividends, Common Stock, Cash |
Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. |
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us-gaap |
Dividends Payable, Amount (Deprecated 2012-01-31) |
The aggregate amount of dividends declared, but not paid, as of the financial reporting date. |
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us-gaap |
Earnings Per Share, Diluted |
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. |
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us-gaap |
Effective Income Tax Rate Reconciliation, Percent |
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. |
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us-gaap |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). |
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|
us-gaap |
Employee-related Liabilities, Current |
Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |
Amount of cost not yet recognized for nonvested award under share-based payment arrangement. |
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us-gaap |
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount |
Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. |
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us-gaap |
Employee Stock Ownership Plan (ESOP), Cash Contributions to ESOP |
This item represents the amount of cash contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP). |
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us-gaap |
Employee Stock Ownership Plan (ESOP), Compensation Expense |
The amount of plan compensation cost recognized during the period. |
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us-gaap |
Employee Stock Ownership Plan (ESOP), Number of Allocated Shares |
The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested. |
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us-gaap |
Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP |
This item represents the number of shares provided to the Employee Stock Ownership Plan (ESOP) during the period. |
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us-gaap |
Equity Method Investment, Ownership Percentage |
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. |
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us-gaap |
Excess Tax Benefit from Share-based Compensation, Financing Activities |
Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. |
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us-gaap |
Extensions, Discoveries, Additions and Improved Recovery, Less Related Costs |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of extensions, discoveries and improved recovery of proved oil and gas reserves. |
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us-gaap |
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) |
Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. |
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us-gaap |
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Other Income (Deprecated 2013-01-31) |
This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets) in other income. Such unrealized (holding) gains or losses relate to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). |
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us-gaap |
Fair Value, Assets Measured on Recurring Basis, Gain (Loss) Included in Other Income (Deprecated 2013-01-31) |
This item represents the amount of the total realized and unrealized gains or losses for the period which are included in the statement of income (or changes in net assets) in other income; the fair value of which assets was or is measured on a recurring basis using significant unobservable inputs (Level 3). |
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us-gaap |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings |
Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). |
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us-gaap |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) |
Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. |
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us-gaap |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |
Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. |
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us-gaap |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings |
Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3). |
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us-gaap |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements |
Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. |
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us-gaap |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers, Net |
Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into (out of) level 3 of the fair value hierarchy. |
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us-gaap |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Cash Inflows |
Amount of estimated future accumulated cash inflow from the sale of proved oil and gas reserves. |
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|
us-gaap |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Development Costs |
Amount of estimated future accumulated cash outflow for costs to be incurred in developing proved oil and gas reserves. |
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|
us-gaap |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Income Tax Expense |
Amount of estimated future accumulated cash outflow for income tax, based on the future income less future expense derived from production and sale of proved oil and gas reserves. |
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|
us-gaap |
Oil and Gas Property, Lease Operating Expense (Deprecated 2018-01-31) |
Amount of lease operating expense related to property used in oil and gas production. |
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us-gaap |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Production Costs |
Amount of estimated future accumulated cash outflow for costs to be incurred in producing proved oil and gas reserves. |
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us-gaap |
Gain (Loss) on Derivative Instruments, Net, Pretax |
Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. |
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us-gaap |
Gain (Loss) on Investments |
Amount of realized and unrealized gain (loss) on investment. |
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us-gaap |
Gain (Loss) on Sale of Derivatives |
The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. |
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us-gaap |
Gain (Loss) on Disposition of Oil and Gas Property |
Amount of gain (loss) on sale or disposal of proven and unproven oil and gas properties. |
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us-gaap |
Gain (Loss) on Disposition of Oil and Gas and Timber Property |
Amount of gain (loss) on sale or disposal of oil and gas property or timber property. |
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us-gaap |
Gain (Loss) on Extinguishment of Debt |
Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. |
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us-gaap |
Gains (Losses) on Sales of Other Real Estate |
The net gain (loss) resulting from sales and other disposals of other real estate owned, increases (decreases) in the valuation allowance for foreclosed real estate, and write-downs of other real estate owned after acquisition or physical possession. |
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us-gaap |
Gas and Oil Area, Developed, Gross |
Area spaced or assigned to productive wells in which a working interest is owned. |
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us-gaap |
Gas and Oil Area, Developed, Net |
Fractional interest owned based on working interests or other economic arrangements of area spaced or assigned to productive wells. |
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us-gaap |
Gas Balancing Asset (Liability) |
The value of gas balancing asset or liability as of the end of the period. |
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us-gaap |
General and Administrative Expense |
The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. |
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us-gaap |
Impairment of Long-Lived Assets Held-for-use |
The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). |
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us-gaap |
Impairment of Long-Lived Assets to be Disposed of |
The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. |
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us-gaap |
Impairment of Oil and Gas Properties |
The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. |
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us-gaap |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |
Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. |
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us-gaap |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest |
Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. |
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us-gaap |
Income (Loss) from Equity Method Investments |
Amount of income (loss) for proportionate share of equity method investee's income (loss). |
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us-gaap |
Income Tax Examination, Penalties and Interest Expense |
The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations. |
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us-gaap |
Income Tax Expense (Benefit) |
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. |
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us-gaap |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |
Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity. |
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us-gaap |
Income Taxes Paid, Net |
The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. |
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us-gaap |
Income Taxes Receivable, Current |
Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. |
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us-gaap |
Operating Leases, Rent Expense |
Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. |
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us-gaap |
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount |
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. |
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us-gaap |
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount |
The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. |
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us-gaap |
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Amount |
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible depletion. |
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us-gaap |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount |
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). |
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us-gaap |
Increase (Decrease) in Accounts Payable |
The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. |
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us-gaap |
Increase (Decrease) in Accounts Receivable |
The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. |
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us-gaap |
Increase (Decrease) in Income Taxes Payable |
The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process (business presence) within a given jurisdiction. |
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us-gaap |
Increase (Decrease) in Accrued Liabilities |
The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid. |
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us-gaap |
Increase (Decrease) in Asset Retirement Obligations |
The increase (decrease) during the reporting period in the carrying amount of asset retirement obligations. |
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us-gaap |
Increase (Decrease) in Assets Held-for-sale |
The increase (decrease) during the period in book value of long-lived assets that the reporting entity plans to sell within one year (or one business cycle). |
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us-gaap |
Increase (Decrease) in Derivative Assets and Liabilities |
The increase (decrease) during the period in the net carrying value of derivative instruments reported as assets and liabilities that are due to be disposed of within one year (or the normal operating cycle, if longer). |
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us-gaap |
Changes in Estimated Future Development Costs |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of change in estimated future development costs. |
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us-gaap |
Changes in Future Income Tax Expense Estimates on Future Cash Flows Related to Proved Oil and Gas Reserves |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of change in the estimated future income tax on future pretax net cash flows related to the entity's proved oil and gas reserves. |
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us-gaap |
Increase (Decrease) in Income Taxes Receivable |
The increase (decrease) during the reporting period in income taxes receivable, which represents the amount due from tax authorities for refunds of overpayments or recoveries of income taxes paid. |
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us-gaap |
Increase (Decrease) in Other Current Assets |
Amount of increase (decrease) in current assets classified as other. |
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us-gaap |
Increase (Decrease) in Other Noncurrent Assets |
Amount of increase (decrease) in noncurrent assets classified as other. |
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us-gaap |
Increase (Decrease) in Other Operating Assets |
Amount of increase (decrease) in operating assets classified as other. |
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us-gaap |
Interest Costs Capitalized |
Amount of interest capitalized during the period. |
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us-gaap |
Interest Costs Incurred |
Total interest costs incurred during the period and either capitalized or charged against earnings. |
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us-gaap |
Interest Expense |
Amount of the cost of borrowed funds accounted for as interest expense. |
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us-gaap |
Interest Paid, Excluding Capitalized Interest, Operating Activities |
Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year One |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year Five |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year Four |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year Three |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Year Two |
Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year |
Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year. |
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us-gaap |
Lessee, Operating Lease, Liability, Undiscounted Excess Amount |
Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. |
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us-gaap |
Letters of Credit Outstanding, Amount |
The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. |
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us-gaap |
Liabilities |
Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. |
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us-gaap |
Liabilities and Equity |
Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. |
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us-gaap |
Liabilities, Current |
Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. |
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us-gaap |
Line of Credit Facility, Interest Rate at Period End |
The effective interest rate at the end of the reporting period. |
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us-gaap |
Line of Credit Facility, Maximum Borrowing Capacity |
Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. |
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us-gaap |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |
The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. |
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us-gaap |
Long-term Investments |
The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). |
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us-gaap |
Noncontrolling Interest, Ownership Percentage by Parent |
The parent entity's interest in net assets of the subsidiary, expressed as a percentage. |
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us-gaap |
Net Cash Provided by (Used in) Financing Activities |
Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. |
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us-gaap |
Net Cash Provided by (Used in) Financing Activities, Continuing Operations |
Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. |
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us-gaap |
Net Cash Provided by (Used in) Investing Activities |
Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. |
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us-gaap |
Stock Issued During Period, Shares, Treasury Stock Reissued |
Number of treasury shares or units reissued. Excludes reissuance of shares or units in treasury for award under share-based payment arrangement. |
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us-gaap |
Net Cash Provided by (Used in) Operating Activities |
Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. |
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us-gaap |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations |
Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. |
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us-gaap |
Net Income (Loss) Attributable to Parent |
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. |
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us-gaap |
Net Income (Loss) Available to Common Stockholders, Basic |
Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. |
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us-gaap |
Net Income (Loss) Available to Common Stockholders, Diluted |
Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders. |
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us-gaap |
Net Increase (Decrease) in Sales and Transfer Prices and Production Costs |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of change in sales and transfer prices and in production (lifting) costs related to future production. |
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us-gaap |
Noncash or Part Noncash Acquisition, Fixed Assets Acquired |
"The amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. ""Part noncash"" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period." |
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us-gaap |
Oil and Gas Property, Successful Effort Method, Accumulated Depreciation, Depletion and Amortization |
Amount of accumulated depreciation, depletion and amortization of oil and gas property carried under the successful effort method. Oil and gas property include, but not limited to, the entity's wells and related equipment and facilities. |
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us-gaap |
Oil and Gas Property, Successful Effort Method, Gross |
Oil and Gas properties, gross, carried under the successful effort method. |
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us-gaap |
Oil and Gas Property, Successful Effort Method, Net |
Oil and gas properties net of accumulated depreciation, depletion, amortization, impairment, and abandonment, carried under the successful effort method. |
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us-gaap |
Oil and Gas Revenue (Deprecated 2018-01-31) |
Aggregate revenue during the period related to oil and gas business activities. |
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us-gaap |
Operating Lease, Expense |
Amount of operating lease expense. Excludes sublease income. |
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|
us-gaap |
Operating Lease, Liability |
Present value of lessee's discounted obligation for lease payments from operating lease. |
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us-gaap |
Operating Lease, Liability, Current |
Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. |
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us-gaap |
Operating Lease, Liability, Noncurrent |
Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. |
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us-gaap |
Operating Lease, Right-of-Use Asset |
Amount of lessee's right to use underlying asset under operating lease. |
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us-gaap |
Operating Leases, Future Minimum Payments Due, Next Twelve Months |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Future Minimum Payments, Due in Five Years |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Future Minimum Payments, Due in Four Years |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Future Minimum Payments, Due in Three Years |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Operating Leases, Future Minimum Payments, Due in Two Years |
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
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us-gaap |
Stock Issued During Period, Value, New Issues |
Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. |
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us-gaap |
Other Accrued Liabilities, Current |
Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer. |
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us-gaap |
Other Assets, Current |
Amount of current assets classified as other. |
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us-gaap |
Other Assets, Noncurrent |
Amount of noncurrent assets classified as other. |
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us-gaap |
Other Liabilities, Current |
Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. |
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us-gaap |
Other Oil and Gas Property, Successful Effort Method |
Amount of oil and gas properties accounted for using the successful effort method, classified as other. |
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us-gaap |
Other Operating Income (Expense), Net |
The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations. |
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us-gaap |
Other Revenue, Net (Deprecated 2018-01-31) |
Amount, after sales adjustments, returns, allowances, and discounts, of revenue classified as other. |
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us-gaap |
Payments for (Proceeds from) Derivative Instrument, Investing Activities |
The net cash outflow or inflow from derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments. |
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us-gaap |
Payments for Repurchase of Common Stock |
The cash outflow to reacquire common stock during the period. |
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us-gaap |
Payments of Debt Issuance Costs |
The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. |
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us-gaap |
Payments of Ordinary Dividends, Common Stock |
Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. |
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us-gaap |
Payment, Tax Withholding, Share-based Payment Arrangement |
Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. |
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us-gaap |
Payments to Acquire Businesses, Gross |
The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. |
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us-gaap |
Payments to Acquire Businesses, Net of Cash Acquired |
The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. |
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us-gaap |
Payments to Acquire Business Two, Net of Cash Acquired |
The cash outflow associated with a second acquisition of a business, net of the cash acquired from the purchase. |
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us-gaap |
Payments to Acquire Oil and Gas Property and Equipment |
The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale. |
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us-gaap |
Payments to Acquire Property, Plant, and Equipment |
The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. |
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us-gaap |
Proceeds from Issuance of Common Stock |
The cash inflow from the additional capital contribution to the entity. |
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us-gaap |
Proceeds from Issuance of Long-term Debt |
The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. |
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us-gaap |
Proceeds from Long-term Lines of Credit |
The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. |
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us-gaap |
Proceeds from Sale of Oil and Gas Property and Equipment |
The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations. |
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us-gaap |
Production Tax Expense |
A tax assessed on oil and gas production. |
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us-gaap |
Productive Gas Wells, Number of Wells, Net |
The total number of producing gas wells and gas wells capable of production, in which the entity owns a fractional working interest. |
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us-gaap |
Productive Oil Wells, Number of Wells, Gross |
The total number of producing oil wells and oil wells capable of production, in which the entity owns an undivided working interest. |
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us-gaap |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. |
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us-gaap |
Proved Developed and Undeveloped Reserve, Extension and Discovery (Energy) |
Energy measure of increase in quantity of proved reserve of oil and gas resulting from the extension of the proved acreage of previously discovered reservoir or discovery of new field with proved reserve or of new reservoir of proved reserve in old field, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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us-gaap |
Proved Developed and Undeveloped Reserve, Net (Energy) |
Energy measure of proved reserve of oil and gas, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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us-gaap |
Proved Developed and Undeveloped Reserve, Revision of Previous Estimate (Energy) |
Energy measure of increase (decrease) in quantity of proved reserve of oil and gas related to revision of a previous estimate resulting from new information, except for an increase in proved acreage, or change in economic factors, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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us-gaap |
Accounts Receivable, Credit Loss Expense (Reversal) |
Amount of expense (reversal of expense) for expected credit loss on accounts receivable. |
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us-gaap |
Realized Investment Gains (Losses) |
Amount of realized gain (loss) on investment. |
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us-gaap |
Repayments of Long-term Debt |
The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. |
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us-gaap |
Restricted Stock or Unit Expense |
Amount of noncash expense for award of restricted stock or unit under share-based payment arrangement. |
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us-gaap |
Retained Earnings (Accumulated Deficit) |
The cumulative amount of the reporting entity's undistributed earnings or deficit. |
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us-gaap |
Revenue from Contract with Customer, Excluding Assessed Tax |
Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. |
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us-gaap |
Revenues |
Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). |
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us-gaap |
Revisions of Previous Quantity Estimates |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of revisions of estimated quantity of oil and gas in proved reserves. |
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us-gaap |
Sales and Transfers of Oil and Gas Produced, Net of Production Costs |
Amount of (increase) decrease in standardized measure of discounted future net cash flow as a result of sales and transfers of oil and gas produced. |
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us-gaap |
Sales Revenue, Goods, Net, Percentage (Deprecated 2013-01-31) |
The percentage of net product revenue to total net revenue from the sale of goods as of year end. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |
Number of shares authorized for issuance under share-based payment arrangement. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |
Percentage of vesting of award under share-based payment arrangement. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested |
Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options. |
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us-gaap |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares |
Number of options vested. |
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us-gaap |
Short-term Debt |
Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. |
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us-gaap |
Significant Costs Incurred to Acquire Mineral Interest of Proved Reserves |
Significant costs that have been incurred, including capitalized costs and costs charged to expense, to acquire mineral interests that have proved reserves. |
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us-gaap |
Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Other |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of changes from other sources. |
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us-gaap |
Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Period Increase (Decrease) |
Amount of increase (decrease) in standardized measure of discounted future net cash flow relating to proved oil and gas reserves. |
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us-gaap |
Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves, Accretion of Discount |
Amount of accretion of discount for the standardized measure of discounted future net cash flow related to proved oil and gas reserves. |
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us-gaap |
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves |
Amount of discounted future accumulated cash inflow relating to proved oil and gas reserves. |
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us-gaap |
Stockholders' Equity before Treasury Stock |
Total amount of stockholders' equity (deficit) items including stock value, paid in capital, retained earnings and including equity attributable to noncontrolling interests and before deducting the carrying value of treasury stock. |
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us-gaap |
Stockholders' Equity Note, Stock Split, Conversion Ratio |
Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. |
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us-gaap |
Tax Cuts and Jobs Act, Change in Tax Rate, Deferred Tax Liability, Income Tax Benefit |
Amount of income tax benefit for remeasurement of deferred tax liability from change in tax rate pursuant to Tax Cuts and Jobs Act. |
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us-gaap |
Taxes Payable, Current |
Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Treasury Stock, Shares |
Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. |
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us-gaap |
Treasury Stock, Shares, Acquired |
Number of shares that have been repurchased during the period and are being held in treasury. |
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us-gaap |
Treasury Stock, Value |
The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. |
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us-gaap |
Treasury Stock, Value, Acquired, Cost Method |
Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. |
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us-gaap |
Unrealized Gain (Loss) on Derivatives |
The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. |
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us-gaap |
Unrealized Gain (Loss) on Investments |
Amount of unrealized gain (loss) on investment. |
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us-gaap |
Weighted Average Number of Shares Outstanding, Diluted |
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. |
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us-gaap |
Weighted Average Number of Shares Outstanding, Basic and Diluted |
Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS). |
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us-gaap |
Weighted Average Number of Shares Outstanding, Basic |
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. |
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us-gaap |
Weighted Average Number of Shares, Restricted Stock |
Number of shares of restricted stock determined by relating the portion of time within a reporting period that restricted shares have been outstanding to the total time in that period. Restricted shares are subject to sales, contractual, regulatory or other restrictions that prevent or inhibit the holder from freely disposing of them before the restriction ends. |
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us-gaap |
Wells in Process of Drilling |
The number of wells in the process of being drilled in each geographic area as of the date listed. |
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us-gaap |
Noncash or Part Noncash Divestiture, Amount of Consideration Received |
Amount of noncash consideration received for selling an asset or business through a noncash (or part noncash) transaction. |
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us-gaap |
Results of Operations, Accretion of Asset Retirement Obligations |
Accretion expense of asset retirement obligations related to oil and gas producing activities. |
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us-gaap |
Results of Operations, Revenue from Oil and Gas Producing Activities |
Total revenues from oil and gas producing activities. |
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us-gaap |
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs |
Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration. |
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us-gaap |
Payments of Stock Issuance Costs |
The cash outflow for cost incurred directly with the issuance of an equity security. |
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us-gaap |
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities |
Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of dilutive convertible securities excluding adjustments related to ESOP convertible preferred stock, stock options, and restrictive stock units. |
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us-gaap |
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements |
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. |
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us-gaap |
Stock Issued During Period, Value, Acquisitions |
Value of stock issued pursuant to acquisitions during the period. |
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us-gaap |
Defined Benefit Plan, Plan Assets, Contributions by Employer |
Amount of contribution received by defined benefit plan from employer which increases plan assets. |
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us-gaap |
Assets Held-for-sale, Not Part of Disposal Group |
Amount of assets held-for-sale that are not part of a disposal group. |
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dei |
Entity Common Stock, Shares Outstanding |
Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument. |
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srt |
Revisions of Previous Quantity Estimates |
Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of revisions of estimated quantity of oil and gas in proved reserves. |
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srt |
Sales and Transfers of Oil and Gas Produced, Net of Production Costs |
Amount of (increase) decrease in standardized measure of discounted future net cash flow as a result of sales and transfers of oil and gas produced. |
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|
srt |
Standardized Measure of Discounted Future Net Cash Flow of Proved Oil and Gas Reserves, Period Increase (Decrease) |
Amount of increase (decrease) in standardized measure of discounted future net cash flow relating to proved oil and gas reserves. |
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srt |
Proved Developed and Undeveloped Reserve, Purchase of Mineral in Place (Energy) |
Energy measure of increase in quantity of proved reserve of oil and gas resulting from purchase of mineral in place, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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us-gaap |
Assets, Current |
Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. |
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us-gaap |
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred (Deprecated 2013-01-31) |
Fair Value of the liabilities incurred by the acquirer to former owners of the acquiree, including the fair value of any contingent consideration. If liabilities transferred as consideration remain within the combined entity after the business combination (for example, because the assets or liabilities were transferred to the acquiree rather than to its former owners), and the acquirer therefore retains control of them; in that situation, the acquirer measures those liabilities at their carrying amounts immediately before the acquisition date. |
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us-gaap |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect |
Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. |
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us-gaap |
Cost of Goods Sold, Oil and Gas (Deprecated 2018-01-31) |
Total costs related to oil and gas produced and sold during the reporting period. |
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us-gaap |
Deferred Tax Assets, Derivative Instruments |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from derivative instruments. |
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us-gaap |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Asset Retirement Obligations |
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from asset retirement obligations. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset. |
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us-gaap |
Derivative Asset, Fair Value, Amount Offset Against Collateral |
Fair value, after effects of master netting arrangements, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against an obligation to return collateral. Includes assets not subject to a master netting arrangement and not elected to be offset. |
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us-gaap |
Derivative Liability, Current |
Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. |
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us-gaap |
Earnings Per Share, Basic and Diluted |
The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. |
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us-gaap |
Exploration Costs, Period Cost |
"The capitalized costs incurred during the period (excluded from amortization) in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or ""G&G"" costs. Exploration costs also include costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, the maintenance of land and lease records, dry hole contributions and bottom hole contributions, costs of drilling and equipping exploratory wells and costs of drilling exploratory-type stratigraphic test wells." |
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us-gaap |
Exploration Expense |
"Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or ""G&G"" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells." |
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us-gaap |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs |
Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. |
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us-gaap |
Furniture and Fixtures, Gross |
Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases. |
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us-gaap |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Net Cash Flows |
Amount, after future accumulated cash outflow for development and production costs and future income tax, of estimated future accumulated cash inflow from the sale of proved oil and gas reserves. |
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us-gaap |
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Ten Percent Annual Discount for Estimated Timing of Cash Flows |
Amount of discount on future accumulated cash inflow, after deducting future accumulated cash outflow for development and production costs and future income tax, from sale of proved oil and gas reserves, using a discount rate of ten percent a year. |
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us-gaap |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount |
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. |
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us-gaap |
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount |
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments. |
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us-gaap |
Lessee, Operating Lease, Liability, to be Paid, after Year Five |
Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). |
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us-gaap |
Long-term Debt, Excluding Current Maturities |
Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. |
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us-gaap |
Net Cash Provided by (Used in) Investing Activities, Continuing Operations |
Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. |
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us-gaap |
Operating Loss Carryforwards, Valuation Allowance |
The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. |
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us-gaap |
Other Noncash Income (Expense) |
Amount of income (expense) included in net income that results in no cash inflow (outflow), classified as other. |
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us-gaap |
Proved Developed and Undeveloped Reserve, Production (Energy) |
Energy measure of decrease in quantity of proved reserve of oil and gas resulting from production, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe). |
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us-gaap |
Stockholders' Equity Attributable to Parent |
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. |
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us-gaap |
Stock Repurchased During Period, Value |
Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. |
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us-gaap |
Proceeds from Sales of Assets, Investing Activities |
Aggregate cash proceeds received from a combination of transactions that are classified as investing activities in which assets, which may include one or more investments, are sold to third-party buyers. This element can be used by entities to aggregate proceeds from all asset sales that are classified as investing activities. |
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us-gaap |
Dividends Payable, Current |
Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). |
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us-gaap |
Operating Lease, Cost |
Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. |
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us-gaap |
Impairment of Leasehold |
The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced. |
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us-gaap |
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount |
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit). |
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us-gaap |
Number of Operating Segments |
Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. |
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us-gaap |
Number of Reportable Segments |
Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. |
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us-gaap |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |
Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. |
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