CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY - 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, 2023			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
Comprehensive income:
Net income	137,053						137,053
Other comprehensive income (loss), net of tax	24,145							24,145
Cash dividends on preferred stock	(1,406)						(1,406)
Cash dividends on common stock	(61,146)						(61,146)
Repurchases of common stock (in shares)					(1,481,565)
Repurchases of common stock	(49,955)				$ (185)	(49,770)
Excise tax on stock repurchases	(457)					(457)
Share-based compensation (in shares)					83,356
Share-based compensation	4,191				$ 10	4,181
Stock issued under employee benefit plans (in shares)					17,120
Stock issued under employee benefit plans	511				$ 3	508
Stock issued under dividend reinvestment and stock purchase plan (in shares)					48,793
Stock issued under dividend reinvestment and stock purchase plan	1,676				$ 6	1,670
Stock options exercised (in shares)					49,084
Stock options exercised	900				$ 6	894
Restricted shares withheld for taxes (in shares)					(23,795)
Restricted shares withheld for taxes	(852)				$ (3)	(849)
Ending balance (in shares) at Sep. 30, 2024			125	10,000
Ending balance at Sep. 30, 2024	2,302,373		$ 125	$ 25,000	$ 7,265	1,192,683	1,229,125	(151,825)
Ending balance (in shares) at Sep. 30, 2024					58,117,115
Beginning balance (in shares) at Jun. 30, 2024			125	10,000
Beginning balance at Jun. 30, 2024	2,212,525		$ 125	$ 25,000	$ 7,256	1,191,193	1,200,930	(211,979)
Beginning balance (in shares) at Jun. 30, 2024					58,045,653
Comprehensive income:
Net income	49,187						49,187
Other comprehensive income (loss), net of tax	60,154							60,154
Cash dividends on preferred stock	(468)						(468)
Cash dividends on common stock	(20,524)						(20,524)
Reduction of excise tax on common stock repurchases, net of share issuances	25					25
Share-based compensation (in shares)					67,140
Share-based compensation	1,437				$ 8	1,429
Stock issued under employee benefit plans (in shares)					5,351
Stock issued under employee benefit plans	168				$ 1	167
Stock issued under dividend reinvestment and stock purchase plan (in shares)					14,903
Stock issued under dividend reinvestment and stock purchase plan	575				$ 2	573
Stock options exercised (in shares)					6,191
Stock options exercised	88				$ 1	87
Restricted shares withheld for taxes (in shares)					(22,123)
Restricted shares withheld for taxes	(794)				$ (3)	(791)
Ending balance (in shares) at Sep. 30, 2024			125	10,000
Ending balance at Sep. 30, 2024	2,302,373		$ 125	$ 25,000	$ 7,265	1,192,683	1,229,125	(151,825)
Ending balance (in shares) at Sep. 30, 2024					58,117,115
Beginning balance (in shares) at Dec. 31, 2024		125	125	10,000
Beginning balance at Dec. 31, 2024	$ 2,304,983		$ 125	$ 25,000	$ 7,247	1,188,768	1,272,528	(188,685)
Beginning balance (in shares) at Dec. 31, 2024	57,974,535				57,974,535
Comprehensive income:
Net income	$ 168,936						168,936
Other comprehensive income (loss), net of tax	32,821							32,821
Cash dividends on preferred stock	(1,406)						(1,406)
Cash dividends on common stock	(62,092)						(62,092)
Repurchases of common stock (in shares)					(939,271)
Repurchases of common stock	(36,476)				$ (117)	(36,359)
Excise tax on stock repurchases	(325)					(325)
Share-based compensation (in shares)					122,365
Share-based compensation	4,916				$ 14	4,902
Stock issued under employee benefit plans (in shares)					14,117
Stock issued under employee benefit plans	480				$ 2	478
Stock issued under dividend reinvestment and stock purchase plan (in shares)					44,748
Stock issued under dividend reinvestment and stock purchase plan	$ 1,737				$ 6	1,731
Stock options exercised (in shares)	16,705				16,705
Stock options exercised	$ 330				$ 2	328
Restricted shares withheld for taxes (in shares)					(40,702)
Restricted shares withheld for taxes	(1,502)				$ (5)	(1,497)
Ending balance (in shares) at Sep. 30, 2025		125	125	10,000
Ending balance at Sep. 30, 2025	$ 2,412,402		$ 125	$ 25,000	$ 7,149	1,158,026	1,377,966	(155,864)
Ending balance (in shares) at Sep. 30, 2025	57,192,497				57,192,497
Beginning balance (in shares) at Jun. 30, 2025			125	10,000
Beginning balance at Jun. 30, 2025	$ 2,347,952		$ 125	$ 25,000	$ 7,159	1,163,170	1,342,473	(189,975)
Beginning balance (in shares) at Jun. 30, 2025					57,272,433
Comprehensive income:
Net income	56,765						56,765
Other comprehensive income (loss), net of tax	34,111							34,111
Cash dividends on preferred stock	(468)						(468)
Cash dividends on common stock	(20,804)						(20,804)
Repurchases of common stock (in shares)					(162,474)
Repurchases of common stock	(6,476)				$ (20)	(6,456)
Excise tax on stock repurchases	(32)					(32)
Share-based compensation (in shares)					91,857
Share-based compensation	1,754				$ 10	1,744
Stock issued under employee benefit plans (in shares)					4,802
Stock issued under employee benefit plans	163				$ 1	162
Stock issued under dividend reinvestment and stock purchase plan (in shares)					14,881
Stock issued under dividend reinvestment and stock purchase plan	597				$ 2	595
Stock options exercised (in shares)					4,762
Stock options exercised	93				$ 1	92
Restricted shares withheld for taxes (in shares)					(33,764)
Restricted shares withheld for taxes	(1,253)				$ (4)	(1,249)
Ending balance (in shares) at Sep. 30, 2025		125	125	10,000
Ending balance at Sep. 30, 2025	$ 2,412,402		$ 125	$ 25,000	$ 7,149	$ 1,158,026	$ 1,377,966	$ (155,864)
Ending balance (in shares) at Sep. 30, 2025	57,192,497				57,192,497