Parent Company - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Noninterest expense
Salaries and employee benefits	$ 169,233	$ 170,233	$ 157,096
Contracted services and professional fees	45,345	42,663	37,919
Advertising and marketing	6,127	5,472	5,509
Other	42,626	41,245	35,112
Total noninterest expense	328,844	319,601	297,691
Income tax benefit	(141,651)	(129,447)	(127,572)
Net income	230,178	213,780	216,672
Comprehensive income	193,426	213,978	210,980
First Hawaiian, Inc.
Income
Dividends from FHB	479,692	175,600	197,800
Other income	368
Total income	480,060	175,600	197,800
Noninterest expense
Salaries and employee benefits	6,820	10,930	3,890
Contracted services and professional fees	5,424	5,791	2,997
Advertising and marketing	4
Other	999	2,076	1,829
Total noninterest expense	13,247	18,797	8,716
Income before income tax benefit and equity in undistributed income (excess distributions) of FHB	466,813	156,803	189,084
Income tax benefit	3,175	7,425	3,443
(Excess distributions) equity in undistributed income of FHB	(239,810)	49,552	24,145
Net income	230,178	213,780	216,672
Comprehensive income	$ 193,426	$ 213,978	$ 210,980