Consolidated Statements of Stockholder's Equity - USD ($) $ in Thousands	Net Investment	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2014	$ 2,726,497				$ (51,457)	$ 2,675,040
Increase (Decrease) in Stockholder's Equity
Net income	108,680					108,680
Contributions	649					649
Distributions	(74,929)					(74,929)
Other comprehensive income, net of tax					6,090	6,090
Balance at Jun. 30, 2015	2,760,897				(45,367)	2,715,530
Balance at Mar. 31, 2015					(35,470)
Increase (Decrease) in Stockholder's Equity
Net income						54,558
Other comprehensive income, net of tax						(9,897)
Balance at Jun. 30, 2015	2,760,897				(45,367)	2,715,530
Balance at Dec. 31, 2015	2,788,200				(51,259)	2,736,941
Increase (Decrease) in Stockholder's Equity
Net income	65,531					65,531
Distributions	(363,624)					(363,624)
Balance at Mar. 31, 2016					(18,373)
Balance at Dec. 31, 2015	2,788,200				(51,259)	2,736,941
Increase (Decrease) in Stockholder's Equity
Net income						120,391
Cash dividends declared ($0.22 per share)				$ (30,000)		(30,000)
Contributions			$ 61,992			61,992
Recapitalization of First Hawaiian, Inc.	$ (2,490,107)	$ 1,395	2,488,712
Other comprehensive income, net of tax					46,032	46,032
Balance at Jun. 30, 2016		1,395	2,479,980	24,860	(5,227)	2,501,008
Balance at Mar. 31, 2016					(18,373)
Increase (Decrease) in Stockholder's Equity
Net income				54,860		54,860
Distributions			(70,724)			(70,724)
Other comprehensive income, net of tax						13,146
Balance at Jun. 30, 2016		$ 1,395	$ 2,479,980	$ 24,860	$ (5,227)	$ 2,501,008