XML 82 R72.htm IDEA: XBRL DOCUMENT v3.25.3

Commitments and Contingencies - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Standby Letters of Credit
Representations and Warranties [Line Items]
Assets secured for standby letters of credit	$ 77.0
Standby and Commercial Letters of Credit | Minimum
Representations and Warranties [Line Items]
Standby and commercial letters of credit remaining term	1 month
Standby and Commercial Letters of Credit | Maximum
Representations and Warranties [Line Items]
Standby and commercial letters of credit remaining term	12 months

X

- Definition

Represents the value of assets secured for the standby letters of credit.

+ References

No definition available.

+ Details

Name:	boh_AssetsSecuredForStandbyLettersOfCredit
Namespace Prefix:	boh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Commitments and contingencies.

+ References

No definition available.

+ Details

Name:	boh_CommitmentsAndContingenciesLineItems
Namespace Prefix:	boh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the remaining term of standby and commercial letters of credit.

+ References

No definition available.

+ Details

Name:	boh_StandbyAndCommercialLettersOfCreditRemainingTerm
Namespace Prefix:	boh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=boh_StandbyAndCommercialLetteresOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: