Fair Value Disclosures [Abstract] Schedule of financial assets and liabilities measured on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of comparison of fair value to the carrying value of the 2019 Senior Notes Fair Value, by Balance Sheet Grouping [Table Text Block] Compensation Plans -- None. No documentation exists for this element. -- Schedule of aggregate compensation under non-equity award plans reflected on the balance sheet Schedule of Aggregate Compensation under other than Share Based Compensation arrangement Balance Sheet location [Table Text Block] Tabular disclosure of the location and amount of aggregate compensation under other than share based compensation arrangement reported in statement of financial position. Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Fair value measurements Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Fair value of commodity derivatives Derivative Assets Total assets Assets, Fair Value Disclosure Liabilities: Liabilities, Fair Value Disclosure [Abstract] Fair value of commodity derivatives Derivative Liabilities Total liabilities Liabilities, Fair Value Disclosure Deferred Revenue Disclosure [Abstract] Deferred Revenue from Volumetric Production Payment Deferred Revenue Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Level 1 Fair Value, Inputs, Level 1 [Member] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value, Disclosure Item Amounts [Domain] Carrying Amount Carrying (Reported) Amount, Fair Value Disclosure [Member] Estimated Fair Value Estimate of Fair Value, Fair Value Disclosure [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] 7.75% Senior Notes due 2019 Senior Notes 7.75 Percent Due 2019 [Member] Represents senior notes bearing interest at 7.75 percent which mature in 2019. Fair Value of Other Financial Instruments Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Long-term debt Long-term Debt, Fair Value Financial Instruments Fair Value Disclosures [Text Block] Asset Retirement Obligation Disclosure [Abstract] Asset Retirement Obligations Asset Retirement Obligation Disclosure [Text Block] Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement Statement [Line Items] ASSETS Assets [Abstract] CURRENT ASSETS Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable: Accounts Receivable, Net, Current [Abstract] Oil and gas sales Accounts Receivable, Net, Current Joint interest and other, net Oil and Gas Joint Interest Billing Receivables and Other, Net, Current Current portion of accounts receivable attributable to joint interest partners in oil and gas properties. These are billings to the non-operators associated with the operation of wells and are based on those owners' working interests in the wells. Also includes receivables not otherwise specified in the taxonomy. The receivables are due within one year of the balance sheet date (or the normal operating cycle, whichever is longer), net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. Affiliates Due from Affiliate, Current Inventory Inventory, Net Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Fair value of derivatives Derivative Assets, Current Prepaids and other Prepaid Expense and Other Assets, Current TOTAL CURRENT ASSETS Assets, Current Assets held for sale Assets Held-for-sale, Current PROPERTY AND EQUIPMENT Property, Plant and Equipment, Net [Abstract] Oil and gas properties, successful efforts method Oil and Gas Property, Successful Effort Method, Gross Natural gas gathering and processing systems Natural Gas Gathering and Processing Systems, Gross This element represents the gross carrying value of natural gas gathering and processing systems, which consist primarily of gas gathering pipelines, compressors and gas processing plants, as of balance sheet date. Contract drilling equipment Capitalized Costs, Support Equipment and Facilities Other Property, Plant and Equipment, Other, Gross PROPERTY AND EQUIPMENT, GROSS Property, Plant and Equipment, Gross Less accumulated depreciation, depletion and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Property, Plant and Equipment, Net OTHER ASSETS Other Assets, Noncurrent [Abstract] Debt issue costs, net Deferred Finance Costs, Noncurrent, Net Fair value of derivatives Derivative Assets, Noncurrent Investments and other Other Assets, Noncurrent TOTAL OTHER ASSETS Other Assets TOTAL ASSETS Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] CURRENT LIABILITIES Liabilities, Current [Abstract] Accounts payable: Accounts Payable, Current [Abstract] Trade Accounts Payable, Trade, Current Oil and gas sales Oil and Gas Sales Payable, Current Affiliates Due to Affiliate, Current Fair value of derivatives Derivative Liabilities, Current Accrued liabilities and other Accrued Liabilities, Current TOTAL CURRENT LIABILITIES Liabilities, Current NON-CURRENT LIABILITIES Liabilities, Noncurrent [Abstract] Long-term debt Long-term Debt, Excluding Current Maturities Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Fair value of derivatives Derivative Liabilities, Noncurrent Asset retirement obligations Asset Retirement Obligations, Noncurrent Deferred revenue from volumetric production payment Deferred Revenue, Noncurrent Accrued compensation under non-equity award plans Deferred Compensation Liability, Classified, Noncurrent Other Other Liabilities, Noncurrent TOTAL NON-CURRENT LIABILITIES Liabilities, Noncurrent COMMITMENTS AND CONTINGENCIES Commitments and Contingencies STOCKHOLDERS' EQUITY Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, par value $.10 per share, authorized - 3,000,000 shares; none issued Preferred Stock, Value, Issued Common stock, par value $.10 per share, authorized — 30,000,000 shares: issued and outstanding — 12,163,536 shares at September 30, 2012 and December 31, 2011 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) TOTAL STOCKHOLDERS' EQUITY Stockholders' Equity Attributable to Parent TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity Guarantor Financial Information Disclosure -- None. No documentation exists for this element. -- Schedule of Condensed Financial Statements [Table] Schedule of Condensed Financial Statements [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Issuer Parent Company [Member] Guarantor Subsidiaries Guarantor Subsidiaries [Member] Adjustments/Eliminations Consolidation, Eliminations [Member] Condensed consolidating financial statements Condensed Financial Statements, Captions [Line Items] Total revenue Revenues Costs and expenses Costs and Expenses Operating income (loss) Operating Income (Loss) Other income (expense) Nonoperating Income (Expense) Equity in earnings of subsidiaries Income (Loss) from Equity Method Investments Income tax (expense) benefit Income Tax Expense (Benefit) NET INCOME (LOSS) Net Income (Loss) Available to Common Stockholders, Basic Nature of Operations Disclosures -- None. No documentation exists for this element. -- Percentage of outstanding common stock beneficially owned by Mr.William's Ownership Percentage of Common Stock Outstanding by Beneficial Owner Represents the percentage of the entity's outstanding common stock beneficially owned by an individual who is the Chairman of the Board and Chief Executive Officer. Percentage of outstanding common stock owned by a partnership in which Mr. William's adult children are limited partners Ownership Percentage of Common Stock Outstanding by Partnership Represents the percentage of the entity's outstanding common stock owned by a partnership in which the Chairman of the Board/Chief Executive Officer's adult children are limited partners. Property, Plant and Equipment Impairment or Disposal [Abstract] Number of methods to determine fair value of impaired property Number of Methods to Determine Fair Value of Impaired Property Represents the number of methods used to determine fair value of impaired property. Provisions for impairment of proved properties Impairment of Proved Oil and Gas Properties The expense recorded to reduce the value of oil and gas assets consisting of proved properties as the estimate of future successful production from these properties is reduced. Provisions for impairment of unproved properties Impairment of Unproved Oil and Gas Properties Impairment of unproved oil and gas properties Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Nature of Operations Nature of Operations [Text Block] Impairment of Property and Equipment Asset Impairment Charges [Text Block] Oil and Gas Property, Successful Effort Method, Gross [Abstract] Proved properties Proved Oil and Gas Property, Successful Effort Method Unproved properties Unproved Oil and Gas Property, Successful Effort Method Total capitalized costs Accumulated depletion Oil and Gas Property, Successful Effort Method, Accumulated Depreciation, Depletion and Amortization Net capitalized costs Oil and Gas Property, Successful Effort Method, Net Options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Exercise price, minimum (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Exercise price, maximum (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Market price of common stock (in dollars per share) Share Price Number of options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of net capitalized costs for oil and gas properties Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Revolving credit facility, due November 2015 Revolving Credit Facility [Member] 7 3/4% Senior Notes due 2013 Senior Notes 7.75 Percent Due 2013 [Member] Represents senior notes bearing interest at 7.75 percent which mature in 2013. Debt Instrument, Redemption Period [Axis] Debt Instrument, Redemption Period [Axis] The periods over which the redemption price is in effect. Debt Instrument Redemption Period [Domain] Debt Instrument Redemption Period [Domain] The period over which the redemption price is in effect. Beginning on April 1, 2015 Debt Instrument Redemption Period Beginning April 2015 [Member] The twelve month period beginning April 1, 2015. Beginning on April 1, 2016 Debt Instrument Redemption Period Beginning April 2016 [Member] The twelve month period beginning April 1, 2016. On or after April 1, 2017 Debt Instrument Redemption Period Beginning April 2017 [Member] The period beginning on or after April 1, 2017. Debt Instrument, Variable Rate Base [Axis] Debt Instrument, Variable Rate Base [Axis] The alternative reference rates that may be used to calculate the variable interest rate of the debt instrument. Debt Instrument, Variable Rate Base [Domain] Debt Instrument, Variable Rate Base [Domain] Identification of the reference rate that is used to calculate the variable interest rate of the debt instrument. LIBOR Debt Instrument Variable Rate Base L I B O R [Member] The London Interbank Offered Rate (LIBOR) used to calculate the variable interest rate of the debt instrument. Base rate Debt Instrument, Variable Rate Base [Member] Represents the base rate used to calculate the variable rate of the debt instrument. Prime rate Debt Instrument Variable Rate Base Prime [Member] Represents the prime rate used to calculate the variable rate of the debt instrument. Federal funds rate Debt Instrument Variable Rate Base Federal Funds [Member] Represents the federal funds rate used to calculate the variable rate of the debt instrument. One-month LIBOR Debt Instrument Variable Rate Base One Month Adjusted L I B O R [Member] Represents the one-month adjusted London Interbank Offered Rate (LIBOR) used to calculate the variable rate of the debt instrument. Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Minimum Minimum [Member] Long-Term Debt Debt Instrument [Line Items] Aggregate principal amount of notes issued Debt Instrument, Increase, Additional Borrowings Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Principal redeemed Debt Instrument, Decrease, Repayments Loss on early extinguishment of long-term debt Gains (Losses) on Extinguishment of Debt Redemption premium paid for early extinguishment of long-term debt Payments of Debt Extinguishment Costs Write-off of debt issuance costs Write off of Deferred Debt Issuance Cost Original issue discount (as a percent) Debt Instrument Discount Rate Percentage The percentage of discount at which the debt was issued. Unamortized original issue discount Debt Instrument, Unamortized Discount Redemption price of debt instrument (as a percent) Debt Instrument, Redemption Price as Percentage of Principal Amount Represents the redemption price of the debt instrument as a percentage of the principal amount. Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Number of equal monthly installments to prepay the deficiency Line of Credit, Facility deficiency Prepayment Number of Equal Periodic Installments Represents the number of equal periodic installments which the entity is required to prepay for the deficiency that arises when the borrowing base is less than the amount of outstanding credit exposure under the revolving credit facility. Borrowing base Line of Credit Facility, Current Borrowing Capacity Borrowing base before increase Line of Credit Facility, Current Borrowing Capacity before Increase Represents the current borrowing capacity under the credit facility before increase. Aggregate commitment before increase Line of Credit Facility Aggregate Commitment before Increase Represents the aggregate commitment under the credit facility before increase. Aggregate commitment amount Line of Credit Facility, Aggregate Commitment Amount Represents the aggregate amount committed by the lender under the credit agreement. Outstanding letters of credit Letters of Credit Outstanding, Amount Amount available under the revolving credit facility Line of Credit Facility, Remaining Borrowing Capacity Increased indebtedness outstanding Line of Credit Facility, Increase, Additional Borrowings Percentage of adjusted engineered value of oil and gas interests serving as collateral Line of Credit Facility, Collateral Percentage of Adjusted Engineered Value Represents the percentage of adjusted engineered value of the entity's oil and gas interests evaluated in determining the borrowing base by which revolving credit facility is collateralized. Variable rate basis Debt Instrument, Description of Variable Rate Basis Applicable margin (as a percent) Debt Instrument, Basis Spread on Variable Rate Commitment fee on unused portion (as a percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Effective annual interest rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage Current ratio Line of Credit Facility Covenant Current Ratio Represents the ratio of current assets to current liabilities required by covenants to the entity's line of credit facility. Number of consecutive quarters for which ratio of consolidated funded indebtedness to consolidated EBITDAX is required to be maintained Line of Credit Facility Covenant Compliance Consolidated Funded Indebtedness to Ebitdax Ratio Consecutive Quarters Number Represents the period for which the ratio of consolidated funded indebtedness to consolidated EBITDAX is required to be maintained under financial covenants. Consolidated funded indebtedness to consolidated EBITDAX ratio Line of Credit Facility, Covenant Consolidated Funded Indebtedness to EBITDAX Ratio Represents the ratio of consolidated funded indebtedness to consolidated EBITDAX required to be maintained under financial covenants. Deferred Revenue Arrangement, by Type [Table] Deferred Revenue Arrangement, by Type [Table] Southwest Royalties, Inc. Subsidiaries [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Limited partnerships Series of Individually Immaterial Business Acquisitions [Member] Deferred Revenue Arrangement [Line Items] Deferred Revenue Arrangement [Line Items] Changes in deferred revenue from the VPP Movement in Deferred Revenue [Roll Forward] Beginning of period Deferred revenue from VPP Deferred Revenue, Additions Amortization of deferred revenue from VPP Amortization of Deferred Charges End of period Barrels of oil equivalents of future oil and gas production covered by a term overriding royalty interest conveyed to a third party under the terms of the VPP Business Acquisition, Volumetric Production Payment Barrels of Oil Equivalents of Estimated Future Oil and Gas Productions Covered in Overriding Royalty Interest Represents the barrels of oil equivalents of future oil and gas production covered by a term overriding royalty interest conveyed to a third party under the terms of the volumetric production payment. Remaining obligation (in barrels) Oil and Gas Delivery Commitments and Contracts, Remaining Contractual Volume Schedule of changes in deferred revenue from the VPP Schedule of Changes in Deferred Revenue [Table Text Block] Tabular disclosure of changes in deferred revenue. Document and Entity Information -- None. No documentation exists for this element. -- Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Amendment Description Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Sales of Assets and Impairments of Inventory -- None. No documentation exists for this element. -- Schedule of net gain on sales of assets and impairment of inventory Schedule of Net Gain (Loss) on Sales of Assets and Impairment of Inventory [Table Text Block] Tabular disclosure of information relating to net gain (loss) on sales of assets and impairment of inventory. Segment Reporting [Abstract] Number of reportable operating segments Number of Reportable Segments Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Business Segments [Axis] Business Segments [Axis] Segment [Domain] Segment [Domain] Oil and Gas Oil and Gas [Member] Represents oil and gas, a reportable segment of the entity. Contract Drilling Contract Drilling [Member] Represents contract drilling, a reportable segment of the entity. Intercompany Eliminations Intersegment Elimination [Member] Segment Information Segment Reporting Information [Line Items] Revenues Depreciation, depletion and amortization Depreciation Depletion Amortization Including Impairment 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 including impairment of property and equipment. Other operating expenses Costs and Expenses Excluding Depreciation, Depletion, Amortization and Impairment Represents the details pertaining to other operating expense which includes expenses like production, exploration, natural gas services, drilling rig services, accretion of abandonment obligations, general and administrative and loss on sales of assets and impairment of inventory. It excludes expenses related to depreciation, depletion, amortization and impairment of property and equipment. Interest expense Interest Expense Other (income) expense Nonoperating Income (Expense) Excluding Interest Expense Represents the aggregate amount of income or expense from ancillary business-related activities excluding interest expense. Income (loss) before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest NET INCOME (LOSS) Total assets Additions to property and equipment Segment Reporting Information, Expenditures for Additions to Long-Lived Assets Changes in asset retirement obligations Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Beginning of period Asset Retirement Obligation Additional ARO from new properties Asset Retirement Obligation, Liabilities Incurred Sales or abandonments of properties Asset Retirement Obligation, Liabilities Settled Accretion expense Asset Retirement Obligation, Accretion Expense Revisions of previous estimates Asset Retirement Obligation, Revision of Estimate End of period Other Other Sundry Liabilities, Noncurrent Sales of Assets and Impairments of Inventory Sales of Assets and Impairments of Inventory Disclosure [Text Block] This element represents the disclosure related to the sale, transfer, termination, or other disposition of assets during the period, and the related gains (losses) on the dispositions. It further includes the impairment of inventory amount by which the carrying amount exceeds the fair value of inventory. The amount is charged to the income if the decline in fair value is deemed to be other than temporary. Fixed rate debt maturing 2013 Debt Operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS Net Cash Provided by (Used in) Continuing Operations Beginning of period End of period Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instrument Risk [Axis] Derivative Instrument Risk [Axis] Derivative Contract Type [Domain] Derivative Contract Type [Domain] Commodity Derivatives Commodity Contract [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Nondesignated Not Designated as Hedging Instrument [Member] Amount of Gain or (Loss) Recognized in Earnings Derivative Instruments, Gain (Loss) [Line Items] Realized Gain (Loss) on Sale of Derivatives Unrealized Unrealized Gain (Loss) on Derivatives Total Gain (Loss) on Hedging Activity Schedule of information concerning the entity's net positions in open commodity derivatives Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Schedule of effect of derivative instruments on the consolidated balance sheet Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of gross to net presentation reconciliation of derivative assets and liabilities Schedule of Derivative Instruments [Table Text Block] Schedule of effect of derivative instruments on the consolidated statement of operations and Comprehensive Income (Loss) Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block] Business Combinations [Abstract] Acquisition of Southwest Royalties, Inc. Limited Partnerships Business Combination Disclosure [Text Block] Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income Adjustments to reconcile net income to cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation, depletion and amortization Depreciation, Depletion and Amortization Impairment of property and equipment Impairment of Oil and Gas Properties Exploration costs Exploration Abandonment and Impairment Expense (Gain) loss on sales of assets and impairment of inventory, net Gain (Loss) on Sale of Assets and Asset Impairment Charges Deferred income tax expense Deferred Income Tax Expense (Benefit) Non-cash employee compensation Employee Benefits and Share-based Compensation Unrealized gain on derivatives Accretion of asset retirement obligations Amortization of debt issue costs and original issue discount Amortization of Financing Costs Amortization of deferred revenue from volumetric production payment Changes in operating working capital: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Receivables Accounts payable Increase (Decrease) in Accounts Payable Other Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by operating activities CASH FLOWS FROM INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Additions to property and equipment Payments to Acquire Oil and Gas Property and Equipment Proceeds from volumetric production payment Proceeds from Volumetric Production Payment This element represents cash received from volumetric production payment with a third party during the current period. Proceeds from sales of assets Proceeds from Sale of Productive Assets Increase in equipment inventory Payments to Acquire Machinery and Equipment Other Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities CASH FLOWS FROM FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Proceeds from long-term debt Proceeds from Issuance of Long-term Debt Repayments of long-term debt Repayments of Long-term Debt Premium on early extinguishment of long-term debt Proceeds from exercise of stock options Proceeds from Stock Options Exercised Net cash provided by financing activities NET INCREASE IN CASH AND CASH EQUIVALENTS CASH AND CASH EQUIVALENTS Cash and Cash Equivalents [Abstract] SUPPLEMENTAL DISCLOSURES Supplemental Cash Flow Information [Abstract] Cash paid for interest, net of amounts capitalized Interest Paid, Net Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Guarantee on senior notes Financial Guarantee [Member] 2019 Senior Notes Performance and payment guaranteed Guarantor Obligations [Line Items] Aggregate principal amount of notes issued Debt Instrument, Face Amount Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Acquisition Business Acquisition [Line Items] Number of limited partnerships acquired Number of Businesses Acquired Percentage of assets and liabilities acquired Business Acquisition, Percentage of Assets and Liabilities Acquired Represents the percentage of assets and liabilities of the acquiree acquired in a business combination. Aggregate merger consideration paid Business Acquisition, Cost of Acquired Entity, Purchase Price Upfront cash proceeds under VPP Business Acquisition, Volumetric Production Payment Upfront Cash Proceeds Represents the amount of upfront cash proceeds received under a volumetric production payment entered into to obtain the funds to finance the aggregate merger consideration. Deferred future advances under VPP Business Acquisition, Volumetric Production Payment Deferred Future Advances Represents the amount of deferred future advances to be received under a volumetric production payment entered into to obtain the funds to finance the aggregate merger consideration. Summary of preliminary estimated fair value of the assets acquired and liabilities assumed Business Acquisition, Purchase Price Allocation [Abstract] Cash and cash equivalents Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents Oil and gas properties Business Acquisition Purchase Price Allocation Oil and Gas Property Represents the amount of acquisition cost of a business combination allocated to oil and gas properties to be used in the normal course of business, not including assets that are held-for-sale. Other non-current assets Business Acquisition, Purchase Price Allocation, Other Noncurrent Assets Total assets acquired Business Acquisition, Purchase Price Allocation, Assets Acquired Asset retirement obligations Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities Total liabilities assumed Business Acquisition, Purchase Price Allocation, Liabilities Assumed Net assets acquired Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net Other current assets Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense and Other Assets Schedule of long-term debt Schedule of Long-term Debt Instruments [Table Text Block] Gain on sales of assets Gain on Sale of Property, Plant Equipment The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain. Also includes gains recognized on the sale of oil and gas property. Loss on sales of assets and impairment of inventory: Loss on Sales of Assets and Impairment of Inventory [Abstract] -- None. No documentation exists for this element. -- Loss on sales of assets Loss on Sale of Property Plant Equipment The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the loss. Also includes loss recognized on the sale of oil and gas property. Impairment of inventory Inventory Write-down Total loss on sales of assets and impairment of inventory Loss on Sales of Assets and Impairment of Inventory The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the loss. It also includes the charges against earnings resulting from the write down of inventory from the carrying value to the fair value. Net gain (loss) Number of drilling rigs sold Number of Drilling Rigs Sold Represents the number of drilling rigs sold by the entity. Capacity of drilling rigs sold (in horsepower) Capacity of Drilling Rigs Sold Represents the capacity of drilling rigs sold by the entity. Consideration from sale of assets Sale of Productive Assets Consideration Amount Represents the aggregate amount of cash and non-cash consideration received from sale of property, plant and equipment (capital expenditures), software, and other intangible assets. Total consideration received from sale of assets Proceeds from the sale consisting of promissory note Proceeds from Sale of Productive Assets Non Cash Represents the amount of non-cash proceeds from sale of property, plant and equipment (capital expenditures), software, and other intangible assets. Gain on sale of drilling rigs and related equipment Gain (Loss) on Sale Drilling Rigs and Related Equipment Represents the gain (loss) resulting from the sale of drilling rigs and related equipment. Number of prospects in which certain interests were sold Number of Prospects Interests Sold Represents the number of unproven properties in which interest were sold by the entity. Gain on sale certain interests in prospects Gain (Loss) on Sale of Interest in Prospects Represents the gain (loss) resulting from the sale of interest in prospects. Schedule of changes in asset retirement obligations Schedule of Change in Asset Retirement Obligation [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Segment Information Segment Reporting Disclosure [Text Block] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, authorized shares Preferred Stock, Shares Authorized Preferred stock, issued shares Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, authorized shares Common Stock, Shares Authorized Common stock, issued shares Common Stock, Shares, Issued Common stock, outstanding shares Common Stock, Shares, Outstanding Guarantor Financial Information Condensed Financial Statements [Text Block] Schedule of Compensation Arrangement Other than Share Based Compensation [Table] Schedule of Compensation Arrangement Other than Share Based Compensation [Table] Components of non-equity based arrangement under which compensation is awarded to officers, key employees and consultants. Compensation Arrangement Other than Share based Compensation by Plan Name [Axis] Compensation Arrangement Other than Share based Compensation by Plan Name [Axis] Information relating to compensation plans other than share based compensation by name of plan. Compensation Arrangement Other than Share based Compensation Plan Name [Domain] Compensation Arrangement Other than Share based Compensation Plan Name [Domain] Information relating to compensation plans other than share based compensation, name of the plan. APO Incentive Plan After Payout Incentive Plan [Member] Represents the after-payout incentive plan under non-equity award plans. The participant receives a payout through an award after the entity has recovered its cost plus interest ("the payout".) APO Reward Plan After Payout Reward Plan [Member] Represents a compensatory bonus plan through which the entity pays participants equal to a portion of the after pay out cash flows received by the entity from the entity's working interest in wells in specified areas. SWR Reward Plan Southwest Royalties Reward Plan [Member] Represents the Southwest Royalties reward plan which is a non-equity award plans. Under this plan, participants qualify for a quarterly bonus from a working interest in one well. Full Vesting by Date [Axis] Full Vesting by Date [Axis] Information pertaining to full vesting by dates. Full Vesting Date [Domain] Full Vesting Date [Domain] Represents vesting date for awards under the plan. Full vesting date, November 4, 2011 Full Vesting Date 4 November 2011 [Member] Represents the full vesting date of November 4, 2011 for future amounts payable under the plan. Full vesting date, August 9, 2012 Full Vesting Date 9 August 2012 [Member] Represents the full vesting date of August 9, 2012 for future amounts payable under the plan. Full vesting date, May 5, 2013 Full Vesting Date 5 May 2013 [Member] Represents the full vesting date of May 5, 2013 for future amounts payable under the plan. Full vesting date, June 1, 2013 Full Vesting Date 1 June 2013 [Member] Represents the full vesting date of June 1, 2013 for future amounts payable under the plan. Full vesting date, October 25, 2011 Full Vesting Date 25 October 2011 [Member] Represents the full vesting date of October 25, 2011 for future amounts payable under the plan. Non-Equity Award Plans Compensation Arrangement Other than Share based Compensation [Line Items] -- None. No documentation exists for this element. -- Subsequent revenues received by participants (as a percent) Percentage of Subsequent Revenues Received by Participants Represents the percentage of subsequent revenues received by the participants under the non-equity award plans at payout. Subsequent expenses paid by participants (as a percent) Percentage of Subsequent Expenses Paid by Participants Represents the percentage of subsequent expenses payable by the participants under the non-equity award plans at payout. Economic interests in specified wells drilled or acquired as part of the plan (as a percent) Percentage of Economic Interests in Specified Wells Drilled or Acquired Subjected to Plan Represents the percentage of economic interests in specified wells drilled or acquired by the entity subjected to the non-equity award plans. Number of specified areas in which awards granted Awards Granted, Number of Specified Areas Represents the number of specified areas in which awards are granted under the plan by the entity. Quarterly bonus amount, percentage of after-payout cash flow from wells drilled or recompleted, one Quarterly Bonus Amount Percentage of After Payout Cash Flow from Wells Drilled or Recompleted in Specified Areas, One Represents the established quarterly bonus amount equal to specified percentage of after-payout cash flow from wells drilled or recompleted in the respective areas, one. Quarterly bonus amount, percentage of after-payout cash flow from wells drilled or recompleted, two Quarterly Bonus Amount Percentage of After Payout Cash Flow from Wells Drilled or Recompleted in Specified Areas, Two Represents the established quarterly bonus amount equal to specified percentage of after-payout cash flow from wells drilled or recompleted in the respective areas, two. Number of award fully vested Number of Awards Vested Represents the number of fully vested awards under the non-equity award plans. Number of awards with specified vesting date Number of Awards with Specified Vesting Date Represents the number of awards under the plan vesting on a specified date. Percentage of working interest in well Percentage of Working Interest in Well Represents the percentage of working interest in well used for establishing quarterly bonus amount. Number of wells, working interest Working Interest Number of Wells Represents the number of wells in which the company has working interest. Percentage of subsequent quarterly bonus amounts after full vesting date payable to participants Percentage of Subsequent Quarterly Bonus Amounts after Full Vesting Date Payable to Participants Represents the percentage of all subsequent quarterly bonus amounts after the full vesting date, payable to participants. Vesting period Compensation Arrangement Other than Share based Compensation Award Vesting Period Represents the vesting period over which the estimated compensation expense applicable to the non-equity award plan is recognized. Compensation expense recorded Compensation Arrangement Other than Share based Compensation Award Compensation Expense The compensation expense recognized during the period pertaining to the non-equity award plans. Aggregate compensation under non-equity award plans Deferred Compensation Liability [Abstract] Current liabilities: Accrued liabilities and other Deferred Compensation Liability, Current Non-current liabilities: Total accrued compensation under non-equity award plans Deferred Compensation Liability, Current and Noncurrent Current assets Property and equipment, net Investments in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Other assets Other Assets, Miscellaneous, Noncurrent Current liabilities Other Other Noncurrent Liabilities 1 The aggregate carrying amounts, as of the balance sheet date, of noncurrent liabilities. Equity TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Income Statement [Abstract] REVENUES Revenues [Abstract] Oil and gas sales Oil and Gas Sales Revenue Natural gas services Gas Gathering, Transportation, Marketing and Processing Revenue Drilling rig services Revenue, Oil and Gas Services Total revenues COSTS AND EXPENSES Costs and Expenses [Abstract] Production Oil and Gas Production Expense Exploration: Exploration [Abstract] -- None. No documentation exists for this element. -- Abandonments and impairments Seismic and other Seismic and Other Cost 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 containing oil and gas reserves. Costs of exploration activities may include, 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. May also include costs of carrying and retaining undeveloped properties. Natural gas services Gas Gathering, Transportation, Marketing and Processing Costs Drilling rig services Cost of Services, Oil and Gas General and administrative General and Administrative Expense Loss on sales of assets and impairment of inventory Total costs and expenses Operating income OTHER INCOME (EXPENSE) Nonoperating Income (Expense) [Abstract] Interest expense Loss on early extinguishment of long-term debt Gain (loss) on derivatives Other Other Nonoperating Income (Expense) Total other income (expense) Income tax (expense) benefit Net income (loss) per common share: Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Derivative [Table] Derivative [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Swaps Swap [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Oil Crude Oil [Member] Gas Gas [Member] Represents information pertaining to commodity derivatives relating to natural gas production. Production Period [Axis] Production Period [Axis] Information about derivative contracts based on the production period. Production Period [Domain] Production Period [Domain] Grouping of derivative contracts based on the production period. 4th Quarter 2012 Fourth Quarter 2012 [Member] Represents the derivative contract for production volume during 2012. 2013 Full 2013 [Member] Represents the derivative contract for production volume during 2013. 2014 Full 2014 [Member] Represents the derivative contract for production volume during 2014. Derivatives Derivative [Line Items] Volume (in Bbls or MMBtu) Derivative, Nonmonetary Notional Amount Price (in dollars per barrel) Derivative, Nonmonetary Notional Amount, Price Per Unit Btu factor Oil and Gas Production Volumes Conversion Btu Factor Represents the Btu factor used for conversion. Volumes of oil and gas production converted, denominator (Mcf) Oil and Gas Production Volumes Conversion Rate Denominator Represents the denominator for the energy equivalent rate at which volumes of gas are converted. Volumes of oil and gas production converted, numerator (MMBtu) Oil and Gas Production Volumes Conversion Rate Numerator Represents the numerator for the energy equivalent rate at which volumes of gas are converted. Effective federal and state income tax expense rate (as a percent) Effective Income Tax Rate, Continuing Operations Statutory federal rate (as a percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate Schedule of Condensed Consolidating Balance Sheet Schedule of Condensed Balance Sheet [Table Text Block] Schedule of Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) Schedule of Condensed Income Statement [Table Text Block] Schedule of Condensed Consolidating Statement of Cash Flows Schedule of Condensed Cash Flow Statement [Table Text Block] Schedule of selected financial information regarding operating segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Costs of Oil and Gas Properties Oil and Gas Properties [Text Block] Investments, All Other Investments [Abstract] Investment [Table] Investment [Table] Dalea Investment Group, LLC Dalea Investment Group L L C [Member] Represents the investee of the entity, in which the entity has non-controlling interest. Investment in Dalea Investment Group, LLC Investment [Line Items] Note receivable cancelled Note Receivable Cancelled in Exchange of Membership Interest Represents the amount of note receivable cancelled by the entity in exchange for membership interest. Non-controlling Membership interest (as a percent) Minority Interest Ownership Percentage Represents the percentage of non-controlling interest owned by the entity in the investee. Recorded investment Cost Method Investments Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Effect of Derivative Instruments on the Consolidated Balance Sheets Derivatives, Fair Value [Line Items] Fair value of derivative assets, current Fair value of derivative assets, noncurrent Asset Derivatives, Fair Value Fair value of derivative liabilities, current Fair value of derivative liabilities, noncurrent Liability Derivatives, Fair Value Gross to Net Presentation Reconciliation of Derivative Assets and Liabilities Derivative, Fair Value, Net [Abstract] Assets Derivative Asset, Fair Value, Net [Abstract] Fair value of derivatives-gross presentation Derivative Asset, Fair Value, Gross Asset Effects of netting arrangements Derivative Fair Value of Derivative Asset Amount Offset by Master Netting The amount as of the balance sheet date of the fair value of derivative assets that would be offset against an obligation under a master netting arrangement. Liabilities Derivative Liability, Fair Value, Net [Abstract] Fair value of derivatives-gross presentation Derivative Liability, Fair Value, Gross Liability Effects of netting arrangements Derivative Fair Value of Derivative Liability Amount Offset by Master Netting The amount as of the balance sheet date of the fair value of derivative liability that would be offset against related assets under a master netting arrangement. Long-Term Debt Long-term Debt [Text Block] Investment in Dalea Investment Group, LLC Cost-method Investments, Description [Text Block] Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] BALANCE BALANCE (in shares) Shares, Issued BALANCE BALANCE (in shares) Compensation Plans Share based Compensation Option and Incentive Plans Disclosure [Text Block] Represents disclosure for share-based compensation and incentive plans. The percentage of consolidated total assets and total revenues derived from oil and gas partnerships is less than Maximum Percentage of Consolidated, Total Assets and Revenues Derived from Oil and Gas Limited Partnerships Represents the threshold percentage of consolidated total assets and total revenues derived from oil and gas limited partnerships by the entity that would require additional disclosures of the partnerships. Summary of estimated fair value of the assets acquired and liabilities assumed Schedule of Purchase Price Allocation [Table Text Block]