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:
Net income	124,941						124,941
Other comprehensive income (loss), net of tax	21,187							21,187
Cash dividends on preferred stock	(938)						(938)
Cash dividends on common stock	(39,378)						(39,378)
Share-based compensation (in shares)					14,657
Share-based compensation	2,432				$ 2	2,430
Stock issued under employee benefit plans (in shares)					13,435
Stock issued under employee benefit plans	380				$ 2	378
Stock issued under dividend reinvestment and stock purchase plan (in shares)					33,537
Stock issued under dividend reinvestment and stock purchase plan	1,064				$ 4	1,060
Stock options exercised (in shares)					65,025
Stock options exercised	1,110				$ 8	1,102
Restricted shares withheld for taxes (in shares)					(89)
Restricted shares withheld for taxes	(3)					(3)
Ending balance (in shares) at Jun. 30, 2023			125	10,000
Ending balance at Jun. 30, 2023	2,145,565		$ 125	$ 25,000	$ 7,412	1,233,593	1,097,399	(217,964)
Ending balance (in shares) at Jun. 30, 2023					59,297,148
Beginning balance (in shares) at Mar. 31, 2023			125	10,000
Beginning balance at Mar. 31, 2023	2,122,448		$ 125	$ 25,000	$ 7,407	1,231,532	1,057,298	(198,914)
Beginning balance (in shares) at Mar. 31, 2023					59,257,051
Comprehensive income:
Net income	60,862						60,862
Other comprehensive income (loss), net of tax	(19,050)							(19,050)
Cash dividends on preferred stock	(469)						(469)
Cash dividends on common stock	(20,292)						(20,292)
Share-based compensation (in shares)					7,084
Share-based compensation	1,235				$ 1	1,234
Stock issued under employee benefit plans (in shares)					7,535
Stock issued under employee benefit plans	181				$ 1	180
Stock issued under dividend reinvestment and stock purchase plan (in shares)					19,073
Stock issued under dividend reinvestment and stock purchase plan	550				$ 2	548
Stock options exercised (in shares)					6,405
Stock options exercised	100				$ 1	99
Ending balance (in shares) at Jun. 30, 2023			125	10,000
Ending balance at Jun. 30, 2023	2,145,565		$ 125	$ 25,000	$ 7,412	1,233,593	1,097,399	(217,964)
Ending balance (in shares) at Jun. 30, 2023					59,297,148
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:
Net income	$ 87,866						87,866
Other comprehensive income (loss), net of tax	(36,009)							(36,009)
Cash dividends on preferred stock	(938)						(938)
Cash dividends on common stock	(40,622)						(40,622)
Repurchase of common stock (in shares)					(1,481,565)
Repurchases of common stock	(49,955)				$ (185)	(49,770)
Excise tax on common stock repurchases	(482)					(482)
Share-based compensation (in shares)					16,216
Share-based compensation	2,754				$ 2	2,752
Stock issued under employee benefit plans (in shares)					11,769
Stock issued under employee benefit plans	343				$ 2	341
Stock issued under dividend reinvestment and stock purchase plan (in shares)					33,890
Stock issued under dividend reinvestment and stock purchase plan	$ 1,101				$ 4	1,097
Stock options exercised (in shares)	42,893				42,893
Stock options exercised	$ 812				$ 5	807
Restricted shares withheld for taxes (in shares)					(1,672)
Restricted shares withheld for taxes	(58)					(58)
Ending balance (in shares) at Jun. 30, 2024		125	125	10,000
Ending balance at Jun. 30, 2024	$ 2,212,525		$ 125	$ 25,000	$ 7,256	1,191,193	1,200,930	(211,979)
Ending balance (in shares) at Jun. 30, 2024	58,045,653				58,045,653
Beginning balance (in shares) at Mar. 31, 2024			125	10,000
Beginning balance at Mar. 31, 2024	$ 2,224,803		$ 125	$ 25,000	$ 7,321	1,208,447	1,181,939	(198,029)
Beginning balance (in shares) at Mar. 31, 2024					58,564,819
Comprehensive income:
Net income	39,925						39,925
Other comprehensive income (loss), net of tax	(13,950)							(13,950)
Cash dividends on preferred stock	(469)						(469)
Cash dividends on common stock	(20,465)						(20,465)
Repurchase of common stock (in shares)					(593,123)
Repurchases of common stock	(19,981)				$ (74)	(19,907)
Excise tax on common stock repurchases	(185)					(185)
Share-based compensation (in shares)					8,803
Share-based compensation	1,351					1,351
Stock issued under employee benefit plans (in shares)					5,510
Stock issued under employee benefit plans	157				$ 1	156
Stock issued under dividend reinvestment and stock purchase plan (in shares)					17,675
Stock issued under dividend reinvestment and stock purchase plan	559				$ 2	557
Stock options exercised (in shares)					42,893
Stock options exercised	813				$ 6	807
Restricted shares withheld for taxes (in shares)					(924)
Restricted shares withheld for taxes	(33)					(33)
Ending balance (in shares) at Jun. 30, 2024		125	125	10,000
Ending balance at Jun. 30, 2024	$ 2,212,525		$ 125	$ 25,000	$ 7,256	$ 1,191,193	$ 1,200,930	$ (211,979)
Ending balance (in shares) at Jun. 30, 2024	58,045,653				58,045,653