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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Allowance for Loan and Lease Losses) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2017 USD ($) subsector | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) method subsector | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Accounting Policies [Abstract] |  |  |  |  |  |  |  |  |  |  |
Provision (credit) for loan and lease losses | $ | $ (186) | $ (126) | $ (2,282) | $ (80) | $ (2,645) | $ (743) | $ (1,382) | $ (747) | $ (2,674) | $ (5,517) | $ (15,671)
Number of evaluation methods of loan and lease Allowance | method |  |  |  |  |  |  |  |  | 3 |  |
Number of homogeneous subsectors in the loan portfolio | subsector | 10 |  |  |  |  |  |  |  | 10 |  |

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- Definition Represents the number of homogeneous subsectors in the loan portfolio of the entity. + References No definition available. + Details
Name: | cpf_LoanPortfolioNumberOfHomogeneousSubsectors
Namespace Prefix: | cpf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents number of methods for evaluating the allowance for loan and lease losses. + References No definition available. + Details
Name: | cpf_NumberOfEvaluationMethodsOfLoanAndLeaseAllowance
Namespace Prefix: | cpf_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Provision (Credit) For Loan And Lease Losses + References No definition available. + Details
Name: | cpf_ProvisionCreditForLoanAndLeaseLosses
Namespace Prefix: | cpf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration