Bank of Hawaii Corporation Financial Statements - Schedule of Condensed Statements of Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Investment Securities Held-to-Maturity	$ 4,694,780	$ 3,262,727	$ 3,042,294
Goodwill	31,517	31,517
Other Assets	384,727	435,293
Total Assets	22,784,941	20,603,651	18,095,496
Liabilities
Other Liabilities	196,237	190,263
Total Liabilities	21,173,330	19,229,144
Common Shareholders’ Equity	1,611,611	1,374,507	$ 1,286,832	$ 1,268,200
Total Liabilities and Shareholders’ Equity	22,784,941	20,603,651
Parent Company
Assets
Cash with Bank of Hawaii	6,376	66,704
Investment Securities Held-to-Maturity	2,500	2,501
Goodwill	14,129	14,129
Other Assets	14,130	12,305
Equity in Net Assets of Subsidiaries	1,586,473	1,290,455
Total Assets	1,623,608	1,386,094
Liabilities
Income Taxes Payable	38	974
Other Liabilities	11,959	10,613
Total Liabilities	11,997	11,587
Common Shareholders’ Equity	1,611,611	1,374,507
Total Liabilities and Shareholders’ Equity	$ 1,623,608	$ 1,386,094