Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Schedule of Borrowings) (Details)

v2.4.1.9
Borrowings (Schedule of Borrowings) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Principal components:    
Senior secured revolving credit facility $ 37,000us-gaap_LongTermLineOfCredit $ 35,000us-gaap_LongTermLineOfCredit
Principal components:    
Total carrying value of borrowings 337,000us-gaap_LongTermDebt 335,000us-gaap_LongTermDebt
Senior Secured Revolving Credit Facility [Member]    
Principal components:    
Senior secured revolving credit facility 37,000us-gaap_LongTermLineOfCredit
/ us-gaap_DebtInstrumentAxis
= cpe_SeniorSecuredRevolvingCreditFacilityMember
35,000us-gaap_LongTermLineOfCredit
/ us-gaap_DebtInstrumentAxis
= cpe_SeniorSecuredRevolvingCreditFacilityMember
Secured second lien term loan [Member]    
Principal components:    
Term loan $ 300,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= cpe_SecondLienTermLoanFacilityMember
$ 300,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= cpe_SecondLienTermLoanFacilityMember