Bank of Hawaii Corporation Financial Statements (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest Expense
Total Interest Expense	$ 49,485	$ 58,771	$ 85,460
Noninterest Expense
Total Noninterest Expense	348,193	346,236	350,024
Income Before Income Tax Benefit and Equity in Undistributed Income of Subsidiaries	226,980	260,215	222,240
Income Tax Benefit	(66,937)	(76,273)	(78,207)
Net Income	160,043	183,942	144,033
Parent
Income
Dividends and Interest from Bank of Hawaii	148,356	110,161	123,904
Other Income	496	903	462
Total Income	148,852	111,064	124,366
Interest Expense
Privately Placed Notes			145
Total Interest Expense			145
Noninterest Expense
Intercompany Salaries and Services	867	1,171	925
Other Expenses	1,349	2,086	3,164
Total Noninterest Expense	2,216	3,257	4,089
Income Before Income Tax Benefit and Equity in Undistributed Income of Subsidiaries	146,636	107,807	120,132
Income Tax Benefit	1,855	1,817	2,489
Equity in Undistributed Income of Subsidiaries	11,552	74,318	21,412
Net Income	$ 160,043	$ 183,942	$ 144,033