Atlas Energy, L.P.

CIK:0001347218|SEC Filings
v2.4.1.9
Supplemental Oil and Gas Information (Schedule of Results of Operations from Oil and gas Producing Activities) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Supplemental Oil and Gas Information (Unaudited) [Abstract]      
Revenues $ 475,758,000us-gaap_ResultsOfOperationsRevenueFromOilAndGasProducingActivities $ 273,906,000us-gaap_ResultsOfOperationsRevenueFromOilAndGasProducingActivities $ 92,901,000us-gaap_ResultsOfOperationsRevenueFromOilAndGasProducingActivities
Production costs (184,296,000)us-gaap_ResultsOfOperationsProductionOrLiftingCosts (100,178,000)us-gaap_ResultsOfOperationsProductionOrLiftingCosts (26,624,000)us-gaap_ResultsOfOperationsProductionOrLiftingCosts
Depreciation, depletion and amortization (231,638,000)us-gaap_ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions (132,860,000)us-gaap_ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions (47,000,000)us-gaap_ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions
Long-lived asset impairment (580,654,000)us-gaap_ResultsOfOperationsImpairmentOfOilAndGasProperties [1] (38,014,000)us-gaap_ResultsOfOperationsImpairmentOfOilAndGasProperties [1] (9,507,000)us-gaap_ResultsOfOperationsImpairmentOfOilAndGasProperties [1]
Results of Operations, Income before Income Taxes, Total (520,830,000)us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes 2,854,000us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes 9,770,000us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes
Asset Impairment With In Property Plant And Equipment Net 562,600,000atls_AssetImpairmentWithInPropertyPlantAndEquipmentNet    
Asset impairment of future hedge gains 82,300,000atls_AssetImpairmentOfFutureHedgeGains    
Goodwill, Impairment Loss 18,100,000us-gaap_GoodwillImpairmentLoss    
Chattanooga and New Albany Shales      
Supplemental Oil and Gas Information (Unaudited) [Abstract]      
Long-lived asset impairment   38,000,000us-gaap_ResultsOfOperationsImpairmentOfOilAndGasProperties
/ us-gaap_StatementGeographicalAxis
= atls_ChattanoogaAndNewAlbanyShalesMember
 
Antrim And Niobrara Shales      
Supplemental Oil and Gas Information (Unaudited) [Abstract]      
Long-lived asset impairment     $ 9,500,000us-gaap_ResultsOfOperationsImpairmentOfOilAndGasProperties
/ us-gaap_StatementGeographicalAxis
= atls_AntrimAndNiobraraShalesMember
[1] During the year ended December 31, 2014, the Partnership recognized $580.7 million of asset impairment consisting of $562.6 million related to oil and gas properties within property, plant, and equipment, net on the Partnership’s consolidated balance sheet primarily for ARP’s Appalachian and mid-continent operations, which was reduced by $82.3 million of future hedge gains reclassified from accumulated other comprehensive income, and $18.1 million goodwill impairment resulting from the decline in overall commodity prices. During the year ended December 31, 2013, ARP recognized $38.0 million of impairment primarily related to its shallow natural gas wells in the New Albany shale and unproved acreage in the Chattanooga and New Albany shales. During the year ended December 31, 2012, ARP recognized $9.5 million of impairment related to its shallow natural gas wells in the Antrim and Niobrara shales.