Employee Benefits - Schedule of the Fair Values of the Retirement Plan Assets by Asset Category (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 76,696	$ 74,741	$ 78,214
Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,108	857
Collective Investment Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 75,588	$ 73,884

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.

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+ Details

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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+ Details

BANK OF HAWAII CORP 10-K