|
Derivative Instruments and Hedging Activities (Derivatives Fair Value by Balance Sheet Location) (Details) (USD $)
In Thousands, unless otherwise specified
|
Mar. 31, 2015
|
Dec. 31, 2014
|
| Derivatives, Fair Value [Line Items] |
|
|
| Net Derivative Fair Value |
$ 18,687us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
|
$ 26,601us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
|
| Not Designated as Hedging Instrument [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Asset Fair Value |
19,160us-gaap_DerivativeAssets
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
27,850us-gaap_DerivativeAssets
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
| Liability Fair Value |
(473)us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
(1,249)us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
| Net Derivative Fair Value |
18,687us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
26,601us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
| Current assets - Fair market value of derivatives [Member] | Not Designated as Hedging Instrument [Member] | Natural Gas [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Asset Fair Value |
1,131us-gaap_DerivativeAssets
/ us-gaap_BalanceSheetLocationAxis
= cpe_CurrentAssetsFairMarketValueOfDerivativesMember
/ us-gaap_EnergyAxis
= us-gaap_NaturalGasReservesMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
1,262us-gaap_DerivativeAssets
/ us-gaap_BalanceSheetLocationAxis
= cpe_CurrentAssetsFairMarketValueOfDerivativesMember
/ us-gaap_EnergyAxis
= us-gaap_NaturalGasReservesMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
| Current assets - Fair market value of derivatives [Member] | Not Designated as Hedging Instrument [Member] | Crude Oil [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Asset Fair Value |
18,029us-gaap_DerivativeAssets
/ us-gaap_BalanceSheetLocationAxis
= cpe_CurrentAssetsFairMarketValueOfDerivativesMember
/ us-gaap_EnergyAxis
= us-gaap_CrudeOilMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
26,588us-gaap_DerivativeAssets
/ us-gaap_BalanceSheetLocationAxis
= cpe_CurrentAssetsFairMarketValueOfDerivativesMember
/ us-gaap_EnergyAxis
= us-gaap_CrudeOilMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
| Current liabilities - Fair market value of derivatives [Member] | Not Designated as Hedging Instrument [Member] | Natural Gas [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Liability Fair Value |
(1)us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= cpe_CurrentLiabilitiesFairMarketValueOfDerivativesMember
/ us-gaap_EnergyAxis
= us-gaap_NaturalGasReservesMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
(7)us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= cpe_CurrentLiabilitiesFairMarketValueOfDerivativesMember
/ us-gaap_EnergyAxis
= us-gaap_NaturalGasReservesMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
| Current liabilities - Fair market value of derivatives [Member] | Not Designated as Hedging Instrument [Member] | Crude Oil [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Liability Fair Value |
(472)us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= cpe_CurrentLiabilitiesFairMarketValueOfDerivativesMember
/ us-gaap_EnergyAxis
= us-gaap_CrudeOilMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
(1,242)us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= cpe_CurrentLiabilitiesFairMarketValueOfDerivativesMember
/ us-gaap_EnergyAxis
= us-gaap_CrudeOilMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
| Balance Sheet Current [Member] | Not Designated as Hedging Instrument [Member] | Natural Gas [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Net Derivative Fair Value |
1,130us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
/ us-gaap_BalanceSheetLocationAxis
= cpe_BalanceSheetCurrentMember
/ us-gaap_EnergyAxis
= us-gaap_NaturalGasReservesMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
1,255us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
/ us-gaap_BalanceSheetLocationAxis
= cpe_BalanceSheetCurrentMember
/ us-gaap_EnergyAxis
= us-gaap_NaturalGasReservesMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
| Balance Sheet Current [Member] | Not Designated as Hedging Instrument [Member] | Crude Oil [Member] |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Net Derivative Fair Value |
$ 17,557us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
/ us-gaap_BalanceSheetLocationAxis
= cpe_BalanceSheetCurrentMember
/ us-gaap_EnergyAxis
= us-gaap_CrudeOilMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|
$ 25,346us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
/ us-gaap_BalanceSheetLocationAxis
= cpe_BalanceSheetCurrentMember
/ us-gaap_EnergyAxis
= us-gaap_CrudeOilMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
|