CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance ( in shares) at Dec. 31, 2020		14,980	10,737
Beginning balance at Dec. 31, 2020	$ 992,477	$ 363,204	$ 10,737	$ 122,899	$ (13,923)	$ 509,560
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	33,227					33,227
Other comprehensive (loss)/income net of tax	65,667				65,667
Cash dividends, preferred stock	(5,269)					(5,269)
Cash dividends, common stock	(9,450)					(9,450)
Issuance of common stock (in shares)			21
Issuance of common stock	33		$ 21	12
Stock-based compensation cost	1,665			1,665
Other stock-based award activity	(858)			(858)
Ending balance (in shares) at Mar. 31, 2021		14,980	10,758
Ending balance at Mar. 31, 2021	1,077,492	$ 363,204	$ 10,758	123,718	51,744	528,068
Beginning balance ( in shares) at Dec. 31, 2021		19,980	10,766
Beginning balance at Dec. 31, 2021	1,204,413	$ 484,531	$ 10,766	125,993	3,853	579,270
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	47,837					47,837
Other comprehensive (loss)/income net of tax	(43,518)				(43,518)
Cash dividends, preferred stock	(6,791)					(6,791)
Cash dividends, common stock	(10,229)					(10,229)
Issuance of common stock (in shares)			22
Issuance of common stock	68		$ 22	46
Stock-based compensation cost	2,113			2,113
Other stock-based award activity	(1,049)			(1,049)
Ending balance (in shares) at Mar. 31, 2022		19,980	10,788
Ending balance at Mar. 31, 2022	$ 1,192,844	$ 484,531	$ 10,788	$ 127,103	$ (39,665)	$ 610,087