Bank of Hawaii Corporation Financial Statements (Condensed Statements of Condition) (Details 2) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets
Investment Securities Held-to-Maturity	$ 3,928,170	$ 3,832,997	$ 3,982,736
Goodwill	31,517	31,517
Other Assets	252,596	194,708
Total Assets	17,089,052	16,492,367	15,455,016
Liabilities
Other Liabilities	138,940	134,199
Total Liabilities	15,857,184	15,330,830
Shareholders' Equity	1,231,868	1,161,537	$ 1,116,260	$ 1,055,086
Total Liabilities and Shareholders' Equity	17,089,052	16,492,367
Parent
Assets
Cash with Bank of Hawaii	49,669	51,915
Investment Securities Held-to-Maturity	4,986	4,973
Goodwill	14,129	14,129
Income Taxes Receivable and Deferred Tax Assets	2,567	2,071
Other Assets	8,233	7,744
Equity in Net Assets of Subsidiaries	1,161,037	1,095,077
Total Assets	1,240,621	1,175,909
Liabilities
Income Taxes Payable	517	6,273
Other Liabilities	8,236	8,099
Total Liabilities	8,753	14,372
Shareholders' Equity	1,231,868	1,161,537
Total Liabilities and Shareholders' Equity	$ 1,240,621	$ 1,175,909