Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income:
Loans, including fees	$ 307,035	$ 205,932	$ 867,302	$ 522,588
Securities:
Taxable	103,875	68,311	303,610	167,734
Tax-exempt	56,918	59,450	184,189	173,394
Interest-bearing deposits	91,904	74,257	278,897	106,971
Federal funds sold	183	316	1,246	428
Resell agreements	1,197	64	3,391	78
Total interest income	561,112	408,330	1,638,635	971,193
Interest expense:
Deposits	138,779	42,682	357,034	62,187
Federal funds purchased	288	249	1,283	336
Repurchase agreements	33,195	7,529	99,960	9,837
Junior subordinated deferrable interest debentures	2,260	1,159	6,354	2,515
Subordinated notes	1,164	1,164	3,492	3,492
Total interest expense	175,686	52,783	468,123	78,367
Net interest income	385,426	355,547	1,170,512	892,826
Credit loss expense	11,185	0	30,190	0
Net interest income after credit loss expense	374,241	355,547	1,140,322	892,826
Non-interest income:
Trust and investment management fees	37,616	38,552	113,152	114,984
Service charges on deposit accounts	23,603	22,960	68,969	69,570
Insurance commissions and fees	13,636	13,152	45,528	41,536
Interchange and card transaction fees	4,672	4,614	14,811	13,751
Other charges, commissions, and fees	13,128	11,095	36,922	30,609
Net gain (loss) on securities transactions	12	0	66	0
Other	13,331	9,448	35,343	28,688
Total non-interest income	105,998	99,821	314,791	299,138
Non-interest expense:
Salaries and wages	137,562	127,189	401,102	355,399
Employee benefits	26,527	21,680	87,241	66,633
Net occupancy	31,581	28,133	93,644	83,923
Technology, furniture, and equipment	35,278	30,781	100,802	89,859
Deposit insurance	6,033	4,279	18,480	11,636
Other	56,275	45,836	162,171	135,527
Total non-interest expense	293,256	257,898	863,440	742,977
Income before income taxes	186,983	197,470	591,673	448,987
Income taxes	31,332	27,710	96,251	61,011
Net income	155,651	169,760	495,422	387,976
Preferred stock dividends	1,668	1,668	5,006	5,006
Net income available to common shareholders	$ 153,983	$ 168,092	$ 490,416	$ 382,970
Earnings per common share:
Basic	$ 2.38	$ 2.60	$ 7.56	$ 5.92
Diluted	$ 2.38	$ 2.59	$ 7.54	$ 5.90