2.2.0.25falsefalse0020 - Statement - Condensed Statements of OperationstruefalseIn Thousands, except Per Share datafalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $D2011Q1http://www.sec.gov/CIK0000778438duration2011-01-01T00:00:002011-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalseUSDfalsefalse1/1/2010 - 3/31/2010 USD ($) USD ($) / shares $D2010Q1http://www.sec.gov/CIK0000778438duration2010-01-01T00:00:002010-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$5true0us-gaap_RevenuesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseREVENUES6false0us-gaap_OilAndGasSalesRevenueus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse187389000187389falsetruefalsefalsefalse2truefalsefalse147807000147807falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRevenue from the sale of oil and gas during the period.No authoritative reference available.falsefalseSales of oil and gas7false0us-gaap_ElectricalGenerationRevenueus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse64120006412falsefalsefalsefalsefalse2truefalsefalse99330009933falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRevenue from generation of electricity, a process of producing electric energy by transforming other forms of energy such as nuclear, fossil fuel, solar, geothermal, hydro, and wind.No authoritative reference available.falsefalseSales of electricity8false0us-gaap_GasGatheringTransportationMarketingAndProcessingRevenueus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse36850003685falsefalsefalsefalsefalse2truefalsefalse82720008272falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRevenue related to midstream and downstream gas activities. May include the following: gathering from wells, processing to remove impurities, storage, transmission, and the sale of natural gas and related products.No authoritative reference available.falsefalseGas marketing9false0us-gaap_OtherIncomeus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse128000128falsefalsefalsefalsefalse2truefalsefalse164000164falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryReflects the sum of all other revenue and income recognized by the entity in the period not otherwise specified in the income statement.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 4 -Article 7 falsefalseInterest and other income, net10false0us-gaap_Revenuesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse197614000197614falsefalsefalsefalsefalse2truefalsefalse166176000166176falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 truefalseTOTAL REVENUES AND OTHER INCOME ITEMS11true0us-gaap_CostsAndExpensesAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseEXPENSES12false0us-gaap_OilAndGasProductionExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse5708300057083falsefalsefalsefalsefalse2truefalsefalse4703600047036falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCosts incurred to operate and maintain an entities' wells and related equipment and facilities, including depreciation and applicable operating costs of support equipment and facilities and other costs of operating and maintaining those wells and related equipment and facilities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 24 falsefalseOperating costs - oil and gas production13false0us-gaap_ElectricProductionExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse61130006113falsefalsefalsefalsefalse2truefalsefalse96700009670falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCost incurred directly related to electricity produced and sold during the reporting period.No authoritative reference available.falsefalseOperating costs - electricity generation14false0us-gaap_DirectTaxesAndLicensesCostsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse73910007391falsefalsefalsefalsefalse2truefalsefalse52040005204falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryTaxes and licenses incurred and are directly related to goods produced and sold and services rendered during the reporting period.No authoritative reference available.falsefalseProduction taxes15false0bry_DepreciationDepletionAndAmortizationOfOilAndGasbryfalsedebitdurationDepreciation depletion and amortization of oil and gas directly related to goods produced and sold by an entity during the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse5210900052109falsefalsefalsefalsefalse2truefalsefalse3590700035907falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryDepreciation depletion and amortization of oil and gas directly related to goods produced and sold by an entity during the reporting period.No authoritative reference available.falsefalseDepreciation, depletion & amortization - oil and gas production16false0bry_DepreciationDepletionAndAmortizationOfElectricityGenerationbryfalsedebitdurationDepreciation depletion and amortization of electricity generation directly related to goods produced and sold by an entity...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse501000501falsefalsefalsefalsefalse2truefalsefalse795000795falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryDepreciation depletion and amortization of electricity generation directly related to goods produced and sold by an entity during the reporting period.No authoritative reference available.falsefalseDepreciation, depletion & amortization - electricity generation17false0us-gaap_GasGatheringTransportationMarketingAndProcessingCostsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse35160003516falsefalsefalsefalsefalse2truefalsefalse77860007786falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCost incurred related to the gas activities, such as transportation, marketing and processing crude oil, natural gas and refined petroleum products.No authoritative reference available.falsefalseGas marketing18false0us-gaap_GeneralAndAdministrativeExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1629100016291falsefalsefalsefalsefalse2truefalsefalse1383500013835falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe 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.No authoritative reference available.falsefalseGeneral and administrative19false0us-gaap_InterestExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1565500015655falsefalsefalsefalsefalse2truefalsefalse1744700017447falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cost of borrowed funds accounted for as interest that was charged against earnings during the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 9 -Subsection II Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 9 -Article 9 falsefalseInterest20false0us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeNetus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse127516000127516falsefalsefalsefalsefalse2truefalsefalse-1603000-1603falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b falsefalseRealized and unrealized loss (gain) on derivatives, net21false0bry_GainLossOnPurchaseOfOilAndNaturalGasPropertiesbryfalsecreditdurationThis element represent gain or loss on purchase of oil and natural gas properties .falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-1046000-1046falsefalsefalsefalsefalse2truefalsefalse-1358000-1358falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represent gain or loss on purchase of oil and natural gas properties .No authoritative reference available.falsefalseGain on purchase22false0bry_TransactionCostsOnAcquisitionsbryfalsedebitdurationThis element represents acquisition-related costs incurred to effect a business combination which costs have been expensed...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse20850002085falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees and general administrative costs. This element is gross of the related tax effect.No authoritative reference available.falsefalseTransaction costs on acquisitions23false0bry_DryHoleAbandonmentImpairmentAndExplorationbryfalsedebitdurationExploration costs, exploratory well costs written off as dry holes and impairment of oil and gas properties, building and...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse113000113falsefalsefalsefalsefalse2truefalsefalse13690001369falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryExploration costs, exploratory well costs written off as dry holes and impairment of oil and gas properties, building and equipment.No authoritative reference available.falsefalseDry hole, abandonment, impairment and exploration24false0us-gaap_CostsAndExpensesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse285242000285242falsefalsefalsefalsefalse2truefalsefalse138173000138173falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryTotal costs of sales and operating expenses for the period.No authoritative reference available.truefalseTOTAL EXPENSES25false0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse-87628000-87628falsefalsefalsefalsefalse2truefalsefalse2800300028003falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetarySum of operating profit and nonoperating income (expense) before income (loss) from equity method investments, income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1(i) -Article 4 truefalse(Loss) earnings before income taxes26false0us-gaap_IncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-35131000-35131falsefalsefalsefalsefalse2truefalsefalse1033400010334falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b falsefalseIncome tax (benefit) provision27false0us-gaap_ProfitLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse-52497000-52497falsetruefalsefalsefalse2truefalsefalse1766900017669falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) truefalseNet (loss) earnings28false0us-gaap_EarningsPerShareBasicus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse-0.98-0.98falsetruefalsefalsefalse2truefalsefalse0.340.34falsetruefalsefalsefalseEPSus-types:perShareItemTypedecimalThe amount of net income or loss for the period per each share of common stock outstanding during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 36, 37, 38 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 truetrueBasic net (loss) earnings per share (in dollars per share)29false0us-gaap_EarningsPerShareDilutedus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse-0.98-0.98falsetruefalsefalsefalse2truefalsefalse0.340.34falsetruefalsefalsefalseEPSus-types:perShareItemTypedecimalThe amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 11, 12, 36 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 truetrueDiluted net (loss) earnings per share (in dollars per share)30false0us-gaap_CommonStockDividendsPerShareDeclaredus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse0.0750.075falsetruefalsefalsefalse2truefalsefalse0.0750.075falsetruefalsefalsefalseEPSus-types:perShareItemTypedecimalAggregate dividends declared during the period for each share of common stock outstanding.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 falsetrueDividends per share (in dollars per share)226Condensed Statements of 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