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Other (Commitments and Contingencies, Operating Leases, And Other Property, Equipment) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Mar. 04, 2015
Operating Leases And Other Property Plant And Equipment [Line Items]        
Lease costs $ 17,877,000us-gaap_LeaseAndRentalExpense      
Lease payments in 2015 16,893,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent      
Lease payments in 2016 10,980,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears      
Lease payments in 2017 10,950,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears      
Lease payments in 2018 6,510,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears      
Impairment charge of equipment to be abondoned   1,707,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf 1,177,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf  
Proceeds from sale of equipment   114,000us-gaap_ProceedsFromSaleOfMachineryAndEquipment 527,000us-gaap_ProceedsFromSaleOfMachineryAndEquipment  
Gain on sale of equipment 1,080,000us-gaap_GainLossOnSaleOfOilAndGasProperty      
Subsequent Event [Member]        
Operating Leases And Other Property Plant And Equipment [Line Items]        
Contract Termination Liability       $ 3,733,000cpe_ContractTerminationLiability
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember