Annual report pursuant to Section 13 and 15(d)

Other (Commitments and Contingencies, Operating Leases, And Other Property, Equipment) (Details)

v2.4.1.9
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