CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock Cumulative Preferred Stock	Preferred Stock Non-Cumulative Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2021		125		53,410,411
Beginning balance at Dec. 31, 2021	$ 1,912,571	$ 125		$ 6,676	$ 985,818	$ 864,839	$ 55,113
Comprehensive income:
Net income	48,586					48,586
Other comprehensive (loss) income, net of tax	(139,505)						(139,505)
Cash dividends on common stock	(15,607)					(15,607)
Share-based compensation (in shares)				1,200
Share-based compensation	1,100				1,100
Stock issued under dividend reinvestment and stock purchase plan (in shares)				10,639
Stock issued under dividend reinvestment and stock purchase plan	471			$ 2	469
Stock options exercised (in shares)				3,000
Stock options exercised	37				37
Restricted shares withheld for taxes (in shares)				(427)
Restricted shares withheld for taxes	(20)				(20)
Ending balance (in shares) at Mar. 31, 2022		125		53,424,823
Ending balance at Mar. 31, 2022	1,807,633	$ 125		$ 6,678	987,404	897,818	(84,392)
Beginning balance (in shares) at Dec. 31, 2022		125	10,000	59,170,583
Beginning balance at Dec. 31, 2022	2,034,770	$ 125	$ 25,000	$ 7,396	1,228,626	1,012,774	(239,151)
Comprehensive income:
Net income	64,079					64,079
Other comprehensive (loss) income, net of tax	40,237						40,237
Cash dividends on preferred stock	(469)					(469)
Cash dividends on common stock	(19,086)					(19,086)
Share-based compensation (in shares)				7,573
Share-based compensation	1,197			$ 1	1,196
Stock issued under employee benefit plans (in shares)				5,900
Stock issued under employee benefit plans	199			$ 1	198
Stock issued under dividend reinvestment and stock purchase plan (in shares)				14,464
Stock issued under dividend reinvestment and stock purchase plan	$ 514			$ 2	512
Stock options exercised (in shares)	58,620			58,620
Stock options exercised	$ 1,010			$ 7	1,003
Restricted shares withheld for taxes (in shares)				(89)
Restricted shares withheld for taxes	(3)				(3)
Ending balance (in shares) at Mar. 31, 2023		125	10,000	59,257,051
Ending balance at Mar. 31, 2023	$ 2,122,448	$ 125	$ 25,000	$ 7,407	$ 1,231,532	$ 1,057,298	$ (198,914)