Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2021	$ 723,209	$ 0	$ 0	$ 352,122	$ 363,742	$ 7,345
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	48,422				48,422
Other comprehensive (loss) income, net of tax	(100,409)					(100,409)
Amortization of unearned compensation	1,143			1,143
Exercise of stock options	94			94
Stock option expense	13			13
Net settlement of share awards	(1,696)			(1,696)
Stock retirement plans	736			736
Cash dividends on common stock	(13,647)				(13,647)
Ending balance at Jun. 30, 2022	657,865	0	0	352,412	398,517	(93,064)
Beginning balance at Mar. 31, 2022	677,450	0	0	351,522	380,700	(54,772)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,859				24,859
Other comprehensive (loss) income, net of tax	(38,292)					(38,292)
Amortization of unearned compensation	627			627
Net settlement of share awards	(25)			(25)
Stock retirement plans	288			288
Cash dividends on common stock	(7,042)				(7,042)
Ending balance at Jun. 30, 2022	657,865	0	0	352,412	398,517	(93,064)
Beginning balance at Dec. 31, 2022	677,375	0	0	354,188	429,385	(106,198)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	36,991				36,991
Other comprehensive (loss) income, net of tax	8,279					8,279
Amortization of unearned compensation	1,703			1,703
Net settlement of share awards	(723)			(723)
Stock retirement plans	(215)			(215)
Cash dividends on common stock	(14,167)				(14,167)
Ending balance at Jun. 30, 2023	709,243	0	0	354,953	452,209	(97,919)
Beginning balance at Mar. 31, 2023	702,559	0	0	354,035	440,556	(92,032)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,763				18,763
Other comprehensive (loss) income, net of tax	(5,887)					(5,887)
Amortization of unearned compensation	944			944
Net settlement of share awards	(26)			(26)
Cash dividends on common stock	(7,110)				(7,110)
Ending balance at Jun. 30, 2023	$ 709,243	$ 0	$ 0	$ 354,953	$ 452,209	$ (97,919)