CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Preferred Stock	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, 2022			125	10,000
Beginning balance at Dec. 31, 2022	$ 2,034,770		$ 125	$ 25,000	$ 7,396	$ 1,228,626	$ 1,012,774	$ (239,151)
Beginning balance (in shares) at Dec. 31, 2022					59,170,583
Comprehensive income (loss):
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
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
Ending balance at Mar. 31, 2023	2,122,448		$ 125	$ 25,000	$ 7,407	1,231,532	1,057,298	(198,914)
Ending balance (in shares) at Mar. 31, 2023					59,257,051
Beginning balance (in shares) at Dec. 31, 2023		125	125	10,000
Beginning balance at Dec. 31, 2023	$ 2,247,713		$ 125	$ 25,000	$ 7,428	1,236,506	1,154,624	(175,970)
Beginning balance (in shares) at Dec. 31, 2023	59,424,122				59,424,122
Comprehensive income (loss):
Net income	$ 47,941						47,941
Other comprehensive (loss) income, net of tax	(22,059)							(22,059)
Cash dividends on preferred stock	(469)						(469)
Cash dividends on common stock	(20,157)						(20,157)
Repurchase of common stock (in shares)					(888,442)
Repurchases of common stock	(29,974)				$ (111)	(29,863)
Excise tax on stock repurchase	(297)					(297)
Share-based compensation (in shares)					7,413
Share-based compensation	1,402				$ 1	1,401
Stock issued under employee benefit plans (in shares)					6,259
Stock issued under employee benefit plans	186				$ 1	185
Stock issued under dividend reinvestment and stock purchase plan (in shares)					16,215
Stock issued under dividend reinvestment and stock purchase plan	$ 542				$ 2	540
Stock options exercised (in shares)	0
Restricted shares withheld for taxes (in shares)					(748)
Restricted shares withheld for taxes	$ (25)					(25)
Ending balance (in shares) at Mar. 31, 2024		125	125	10,000
Ending balance at Mar. 31, 2024	$ 2,224,803		$ 125	$ 25,000	$ 7,321	$ 1,208,447	$ 1,181,939	$ (198,029)
Ending balance (in shares) at Mar. 31, 2024	58,564,819				58,564,819