CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member] Cumulative Effect Period Of Adoption Adjusted Balance [Member]	Accumulated Other Comprehensive (Loss) Income, net of tax [Member]
Balance at beginning of year at Dec. 31, 2018		$ 36,104	$ 21,724	$ 939,674	$ 1,087,617			$ (40,415)
Common stock issued as compensation			0	0
Common stock withheld for taxes			(18)	(1,941)
Issuance costs of common stock issued in exchange for Series A through E preferred stock				0
Restricted stock grants			31	(31)
Unrestricted stock grants			0	0
Restricted stock forfeited			(1)	1
Stock-based compensation				3,949
Net income	$ 167,377				167,377
Dividends on common stock					(30,501)
Dividends on preferred stock					(2,676)
Stock redeemed					0
Other comprehensive (loss) income, net of tax	47,179							47,179
Balance at end of year at Dec. 31, 2019	2,228,073	36,104	21,736	941,652	1,221,817	$ (62,322)	$ 1,159,495	6,764
Common stock issued as compensation			0	0
Common stock withheld for taxes			(5)	(201)
Issuance costs of common stock issued in exchange for Series A through E preferred stock				0
Restricted stock grants			90	(90)
Unrestricted stock grants			2	(2)
Restricted stock forfeited			0	0
Stock-based compensation				5,117
Net income	102,273				102,273
Dividends on common stock					(43,771)
Dividends on preferred stock					(2,676)
Stock redeemed					0
Other comprehensive (loss) income, net of tax	48,691							48,691
Balance at end of year at Dec. 31, 2020	2,275,179	36,104	21,823	946,476	1,215,321			55,455
Common stock issued as compensation			30	(30)
Redemption of preferred stock		(36,104)
Common stock withheld for taxes	(213,900)		(1,695)	(214,827)
Issuance costs of common stock issued in exchange for Series A through E preferred stock				(1,234)
Restricted stock grants			33	(33)
Unrestricted stock grants			0	0
Restricted stock forfeited			(8)	8
Stock-based compensation				5,460
Net income	281,025				281,025
Dividends on common stock					(65,364)
Dividends on preferred stock					(2,453)
Stock redeemed					1,234
Other comprehensive (loss) income, net of tax	(139,454)							(139,454)
Balance at end of year at Dec. 31, 2021	$ 2,101,767	$ 0	$ 20,183	$ 738,288	$ 1,427,295			$ (83,999)