Quarterly report pursuant to Section 13 or 15(d)

Acquistions (Schedule of Acquisition Fair Value of Net Assets ) (Details)

v2.4.1.9
Acquistions (Schedule of Acquisition Fair Value of Net Assets ) (Details) (Central Midland Basin [Member], USD $)
In Thousands, unless otherwise specified
Oct. 08, 2014
Business Acquisition [Line Items]  
Oil and natural gas properties $ 91,895us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Asset retirement obligations (140)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Net assets to be acquired 210,205us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
Unevaluated Oil and Gas Properties [Member]
 
Business Acquisition [Line Items]  
Oil and natural gas properties $ 118,450us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= cpe_CentralMidlandBasinMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= cpe_UnevaluatedOilAndGasPropertiesMember