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Employee Benefit Plans (Cash-Settleable RSU Awards) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
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12 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2015
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
1,414,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
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| Payments to settle vested liability share-based awards |
$ 3,469cpe_PaymentsToSettleVestedLiabilityShareBasedAwards
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$ 239cpe_PaymentsToSettleVestedLiabilityShareBasedAwards
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$ 3,383cpe_PaymentsToSettleVestedLiabilityShareBasedAwards
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| Cash-settled restricted stock unit awards |
3,856us-gaap_DeferredCompensationShareBasedArrangementsLiabilityCurrent
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4,173us-gaap_DeferredCompensationShareBasedArrangementsLiabilityCurrent
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| Scenario, Forecast [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-settled restricted stock unit awards |
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3,599us-gaap_DeferredCompensationShareBasedArrangementsLiabilityCurrent
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
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| Market-based Cash-settleable RSU Awards [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Number of Units Vesting Range, of Base Units Awarded |
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100.00%cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardNumberOfUnitsVestingRangeOfBaseUnitsAwarded
/ us-gaap_AwardTypeAxis
= cpe_MarketbasedCashsettleableRSUAwardsMember
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| Cash-Settleable Awards, Base Units, Actual Units Vested During Period |
523,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsActualUnitsVestedDuringPeriod
/ us-gaap_AwardTypeAxis
= cpe_MarketbasedCashsettleableRSUAwardsMember
|
260,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsActualUnitsVestedDuringPeriod
/ us-gaap_AwardTypeAxis
= cpe_MarketbasedCashsettleableRSUAwardsMember
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| Payments to settle vested liability share-based awards |
1,241cpe_PaymentsToSettleVestedLiabilityShareBasedAwards
/ us-gaap_AwardTypeAxis
= cpe_MarketbasedCashsettleableRSUAwardsMember
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1,669cpe_PaymentsToSettleVestedLiabilityShareBasedAwards
/ us-gaap_AwardTypeAxis
= cpe_MarketbasedCashsettleableRSUAwardsMember
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| Non-Market Based Cash-settleable RSU Awards [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Actual Units Vested During Period |
58,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsActualUnitsVestedDuringPeriod
/ us-gaap_AwardTypeAxis
= cpe_NonMarketBasedCashsettleableRSUAwardsMember
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| Cash-Settleable Awards, Number of Units Vesting Range, of Actual Units Awarded |
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65,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardNumberOfUnitsVestingRangeOfActualUnitsAwarded
/ us-gaap_AwardTypeAxis
= cpe_NonMarketBasedCashsettleableRSUAwardsMember
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| Payments to settle vested liability share-based awards |
$ 559cpe_PaymentsToSettleVestedLiabilityShareBasedAwards
/ us-gaap_AwardTypeAxis
= cpe_NonMarketBasedCashsettleableRSUAwardsMember
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$ 239cpe_PaymentsToSettleVestedLiabilityShareBasedAwards
/ us-gaap_AwardTypeAxis
= cpe_NonMarketBasedCashsettleableRSUAwardsMember
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| Minimum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
273,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Minimum [Member] | Cash-settleable RSU awards [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Number of Units Vesting Range, of Base Units Awarded |
0.00%cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardNumberOfUnitsVestingRangeOfBaseUnitsAwarded
/ us-gaap_AwardTypeAxis
= cpe_CashSettleableRsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Minimum [Member] | Market-based Cash-settleable RSU Awards [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Number of Units Vesting Range, of Base Units Awarded |
150.00%cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardNumberOfUnitsVestingRangeOfBaseUnitsAwarded
/ us-gaap_AwardTypeAxis
= cpe_MarketbasedCashsettleableRSUAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Maximum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
2,555,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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| Maximum [Member] | Cash-settleable RSU awards [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Number of Units Vesting Range, of Base Units Awarded |
200.00%cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardNumberOfUnitsVestingRangeOfBaseUnitsAwarded
/ us-gaap_AwardTypeAxis
= cpe_CashSettleableRsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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| Maximum [Member] | Market-based Cash-settleable RSU Awards [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Number of Units Vesting Range, of Base Units Awarded |
200.00%cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardNumberOfUnitsVestingRangeOfBaseUnitsAwarded
/ us-gaap_AwardTypeAxis
= cpe_MarketbasedCashsettleableRSUAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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| Vesting in 2015 [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
837,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
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| Vesting in 2015 [Member] | Minimum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
52,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
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| Vesting in 2015 [Member] | Maximum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
1,622,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
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| Vesting in 2016 [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
416,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
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| Vesting in 2016 [Member] | Minimum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
60,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
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| Vesting in 2016 [Member] | Maximum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
772,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
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| Vesting in 2017 [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
24,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
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| Vesting in 2017 [Member] | Minimum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
24,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
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| Vesting in 2017 [Member] | Maximum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
24,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
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| Other [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
137,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_VestingAxis
= cpe_VestingOtherMember
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| Other [Member] | Minimum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
137,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VestingAxis
= cpe_VestingOtherMember
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| Other [Member] | Maximum [Member] |
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| Defined Benefit Plan Disclosure [Line Items] |
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| Cash-Settleable Awards, Base Units, Liability, Outstanding |
137,000cpe_CashSettleableCompensationArrangementByCashBasedArrangementsAwardBaseUnitsLiabilityOutstanding
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VestingAxis
= cpe_VestingOtherMember
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