Unaudited Consolidated Statements of Changes in Shareholders Equity - USD ($) $ in Thousands	Total	Cumulative effect accounting adjustment	[1]	Common Stock	Additional Paid in Capital	Retained Earnings	Retained Earnings Cumulative effect accounting adjustment	[1]	Accumulated Other Comprehensive Income (Loss)	Unallocated Common Stock Held by ESOP
Beginning balance (in shares) at Dec. 31, 2020				186,758,154
Beginning Balance at Dec. 31, 2020	$ 3,428,052			$ 1,868	$ 1,854,068	$ 1,665,607			$ 54,234	$ (147,725)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends to common shareholders	(10,324)					(10,324)
Net income	47,663					47,663
Other comprehensive loss, net of tax	(80,426)								(80,426)
ESOP shares committed to be released	2,080				827					1,253
Ending balance (in shares) at Mar. 31, 2021				186,758,154
Ending balance at Mar. 31, 2021	$ 3,387,045			$ 1,868	1,854,895	1,702,946			(26,192)	(146,472)
Beginning balance (in shares) at Dec. 31, 2021	186,305,332			186,305,332
Beginning Balance at Dec. 31, 2021	$ 3,406,352	$ (20,098)		$ 1,863	1,835,241	1,768,653	$ (20,098)		(56,696)	(142,709)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends to common shareholders	(17,074)					(17,074)
Repurchased common stock (in shares)				(2,866,621)
Repurchased common stock	(60,595)			$ (29)	(60,566)
Share-based compensation	1,623				1,623
Net income	51,516					51,516
Other comprehensive loss, net of tax	(355,958)								(355,958)
ESOP shares committed to be released	$ 2,626				1,372					1,254
Ending balance (in shares) at Mar. 31, 2022	183,438,711			183,438,711
Ending balance at Mar. 31, 2022	$ 3,008,392			$ 1,834	$ 1,777,670	$ 1,782,997			$ (412,654)	$ (141,455)

[1] Represents gross transition adjustment amount of $28.0 million, net of taxes of $7.9 million, to reflect the cumulative impact on retained earnings pursuant to the Company’s adoption of Accounting Standards Update 2016-13. Refer to Note 4, “Loans and Allowance for Credit Losses” for additional discussion.