Consolidated Statements of Changes in Shareholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Founders Financial Corporation [Member]	Anchor BanCorp Wisconsin Inc [Member]	Common Stock [Member]	Common Stock [Member] Founders Financial Corporation [Member]	Common Stock [Member] Anchor BanCorp Wisconsin Inc [Member]	Capital Surplus [Member]	Capital Surplus [Member] Founders Financial Corporation [Member]	Capital Surplus [Member] Anchor BanCorp Wisconsin Inc [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2014	$ 1,465,764			$ 116,847			$ 1,118,292			$ 262,180	$ (31,555)
Net income	47,062									47,062
Other comprehensive income (loss)	(6,507)										(6,507)
Acquisition		$ 50,626			$ 3,402			$ 47,224
Dividends - common stock	(28,065)									(28,065)
Common stock issued	192			14			178
Common stock repurchased	(74,594)			(5,385)			(69,209)
Stock based compensation expense	2,236						2,236
Stock activity under incentive compensation plans	9			327			(337)			19
Ending Balance at Jun. 30, 2015	1,456,723			115,205			1,098,384			281,196	(38,062)
Beginning Balance at Dec. 31, 2014	1,465,764			116,847			1,118,292			262,180	(31,555)
Ending Balance at Dec. 31, 2015	1,491,170			114,297			1,087,911			323,759	(34,797)
Net income	66,099									66,099
Other comprehensive income (loss)	11,180										11,180
Acquisition			$ 273,565			$ 20,415			$ 253,150
Dividends - common stock	(32,391)									(32,391)
Common stock issued	202			17			185
Common stock repurchased	(1,546)			(120)			(1,426)
Stock based compensation expense	3,391						3,391
Stock activity under incentive compensation plans	(553)			396			(818)			(131)
Ending Balance at Jun. 30, 2016	$ 1,811,117			$ 135,005			$ 1,342,393			$ 357,336	$ (23,617)