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INVESTMENT SECURITIES (Details 2) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Held to Maturity, Amortized Cost |  |  |  |  |
Mortgage-backed securities |  |  | $ 238,287,000 us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount |  |
Held to Maturity, Estimated Fair Value |  |  |  |  |
Mortgage-backed securities |  |  | 235,597,000 us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue |  |
Available for Sale, Amortized Cost |  |  |  |  |
Due in one year or less |  |  | 3,851,000 us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis |  |
Due after one year through five years |  |  | 56,846,000 us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis |  |
Due after five years through ten years |  |  | 112,838,000 us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis |  |
Due after ten years |  |  | 116,982,000 us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis |  |
Mortgage-backed securities |  |  | 925,432,000 cpf_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateMortgageBackedSecuritiesAmortizedCost |  |
Other |  |  | 757,000 cpf_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateOtherAmortizedCost |  |
Total |  |  | 1,216,706,000 us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis |  |
Available for Sale, Estimated Fair Value |  |  |  |  |
Due in one year or less |  |  | 3,847,000 us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue |  |
Due after one year through five years |  |  | 57,987,000 us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue |  |
Due after five years through ten years |  |  | 113,184,000 us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue |  |
Due after ten years |  |  | 117,231,000 us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue |  |
Mortgage-backed securities |  |  | 935,892,000 cpf_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateMortgageBackedSecuritiesFairValue |  |
Other |  |  | 877,000 cpf_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateOtherFairValue |  |
Total | 1,407,999,000 us-gaap_AvailableForSaleSecurities |  | 1,229,018,000 us-gaap_AvailableForSaleSecurities | 1,407,999,000 us-gaap_AvailableForSaleSecurities |
Available for sale |  |  |  |  |
Gross proceeds from sale of available for sale investment securities | 271,500,000 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities | 124,700,000 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities | 162,470,000 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities | 271,931,000 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities | 130,076,000 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Gross realized gains on the sales of the available for sale investment securities |  | 700,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | 900,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | 3,900,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | 1,700,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Gross realized losses on the sales of the available for sale investment securities |  |  | 700,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses | 3,400,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses | 900,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Average net yield of available for sale mortgage backed securities sold (as a percent) | 1.87%cpf_AvailableForSaleSecuritiesSoldAverageNetYield | 0.60%cpf_AvailableForSaleSecuritiesSoldAverageNetYield |  |  |
Weighted average life of available for sale mortgage backed securities sold | 2 years 10 months 24 days | 1 year 3 months 18 days |  |  |
Investment in available-for-sale securities | 242,500,000 cpf_ProceedsReallocatedInAvailableForSaleSecurities |  |  |  |
Net realized gains on the sales of the available for sale investment securities | 500,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet |  |  |  |
Investment in held to maturity investments |  | 133,200,000 cpf_ProceedsReinvestedInHeldToMaturityInvestmentSecurities |  |  |
Average yield of held to maturity investments (as a percent) |  | 1.88%cpf_HeldToMaturityInvestmentsAverageYield |  |  |
Weighted average life of held to maturity |  | 5 years 3 months 18 days |  |  |
Investment securities pledged to party with no right to sell or repledge the collateral | $ 914,100,000 us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedMortgageRelatedSecuritiesAvailableForSaleOrHeldForInvestment |  | $ 900,500,000 us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedMortgageRelatedSecuritiesAvailableForSaleOrHeldForInvestment | $ 914,100,000 us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedMortgageRelatedSecuritiesAvailableForSaleOrHeldForInvestment |
Non Agency Commercial Mortgage Backed Securities and Corporate Bond Securities |  |  |  |  |
Available for sale |  |  |  |  |
Average net yield of available for sale mortgage backed securities sold (as a percent) | 3.21%cpf_AvailableForSaleSecuritiesSoldAverageNetYield / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = cpf_NonAgencyCommercialMortgageBackedSecuritiesAndCorporateBondSecuritiesMember |  |  |  |
Weighted average life of available for sale mortgage backed securities sold | 7 years 4 months 24 days |  |  |  |

X
- Definition Amount of available for sale mortgage-backed debt securities at cost, net of adjustments, that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the cost over several maturity groupings. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments. + References No definition available. + Details
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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the sixth through tenth rolling twelve months following the latest balance sheet. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the second through fifth rolling twelve months following the latest balance sheet. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition Amount of held-to-maturity debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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- Definition Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, over several maturity groupings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d),(f) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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