Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Interest income:
Loans, including fees	$ 346,216	$ 344,689	$ 682,501	$ 679,297
Securities:
Taxable	127,845	130,127	243,044	246,383
Tax-exempt	67,026	58,041	131,924	112,648
Interest-bearing deposits	53,640	68,740	115,096	148,235
Federal funds sold	36	97	80	137
Resell agreements	0	264	85	375
Total interest income	594,763	601,958	1,172,730	1,187,075
Interest expense:
Deposits	114,558	134,293	222,801	267,461
Federal funds purchased	225	281	444	482
Repurchase agreements	29,361	34,677	57,445	67,096
Junior subordinated deferrable interest debentures	1,727	1,939	3,462	3,884
Subordinated notes	1,164	1,164	2,328	2,328
Total interest expense	147,035	172,354	286,480	341,251
Net interest income	447,728	429,604	886,250	845,824
Credit loss expense	9,767	13,129	16,512	26,199
Net interest income after credit loss expense	437,961	416,475	869,738	819,625
Non-interest income:
Trust and investment management fees	47,643	43,669	95,600	86,600
Service charges on deposit accounts	34,177	29,151	66,334	57,772
Insurance commissions and fees	14,166	13,879	36,241	34,898
Interchange and card transaction fees	6,546	5,619	13,078	11,021
Other charges, commissions, and fees	13,787	13,967	27,055	27,553
Net gain (loss) on securities transactions	0	0	0	(14)
Other	11,962	10,988	26,288	23,454
Total non-interest income	128,281	117,273	264,596	241,284
Non-interest expense:
Salaries and wages	172,955	162,149	339,145	323,006
Employee benefits	35,156	32,826	79,812	74,983
Net occupancy	35,223	34,640	69,976	67,917
Technology, furniture, and equipment	42,564	40,572	84,238	80,690
Deposit insurance	6,305	6,590	13,508	13,774
Other	69,497	70,351	140,707	134,824
Total non-interest expense	361,700	347,128	727,386	695,194
Income before income taxes	204,542	186,620	406,948	365,715
Income taxes	32,483	29,617	63,902	57,790
Net income	172,059	157,003	343,046	307,925
Preferred stock dividends	1,669	1,669	3,338	3,338
Net income available to common shareholders	$ 170,390	$ 155,334	$ 339,708	$ 304,587
Earnings per common share:
Basic	$ 2.70	$ 2.39	$ 5.35	$ 4.69
Diluted	$ 2.70	$ 2.39	$ 5.35	$ 4.69