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INCOME AND FRANCHISE TAXES (Details 4) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Tax credit carryforwards  
Expiration period of tax credit carryforwards 20 years
Unrecognized tax benefits that, if recognized would favorably affect the effective income tax rate $ 0us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
State  
Tax credit carryforwards  
Tax credit carryforwards that do not expire 14.7cpf_TaxCreditCarryforwardsNotSubjectToExpiration
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
Federal  
Tax credit carryforwards  
Tax credit carryforwards 15.9us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
Tax credit carryforwards that expire 13.5cpf_TaxCreditCarryforwardsSubjectToExpiration
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember
Tax credit carryforwards that do not expire $ 2.4cpf_TaxCreditCarryforwardsNotSubjectToExpiration
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember