DERIVATIVES (Income Statement) (Details) - Derivatives Not in Cash Flow Hedging Relationship - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Derivative Financial Instruments Not Designated as Hedging Instruments \| Interest rate lock and forward sale commitments
DERIVATIVES
Location of Gain (Loss) Recognized in Earnings on Derivatives	Mortgage banking income	Mortgage banking income
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ 35	$ (8)
Derivative Financial Instruments Not Designated as Hedging Instruments \| Back-to-back swap agreements
DERIVATIVES
Location of Gain (Loss) Recognized in Earnings on Derivatives	Other service charges and fees
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ 80
Derivative Financial Instruments Not Designated as Hedging Instruments \| Loans held for sale
DERIVATIVES
Location of Gain (Loss) Recognized in Earnings on Derivatives		Other
Amount of Gain (Loss) Recognized in Earnings on Derivatives		$ 3
Derivative Financial Instruments Designated as Hedging Instruments \| Interest rate swap agreements
DERIVATIVES
Location of Gain (Loss) Recognized in Earnings on Derivatives	Interest and Dividend Income, Operating	Interest and Dividend Income, Operating
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ (108)	$ 57

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A

+ Details

Name:	us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Indicates line item in statement of income or comprehensive income that includes gain (loss) from derivative.

+ References

+ Details

Name:	us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Namespace Prefix:	us-gaap_
Data Type:	enum2:enumerationSetItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4E

+ Details

Name:	us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=cpf_InterestRateLockandForwardSaleCommitmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=cpf_BackToBackSwapAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=cpf_LoansHeldforsaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: