Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest income:
Loans, including fees	$ 205,932	$ 168,779	$ 522,588	$ 518,957
Securities:
Taxable	68,311	20,736	167,734	61,366
Tax-exempt	59,450	56,882	173,394	169,656
Interest-bearing deposits	74,257	5,830	106,971	11,877
Federal funds sold	316	2	428	13
Resell agreements	64	6	78	11
Total interest income	408,330	252,235	971,193	761,880
Interest expense:
Deposits	42,682	3,677	62,187	10,693
Federal funds purchased	249	9	336	24
Repurchase agreements	7,529	632	9,837	1,597
Junior subordinated deferrable interest debentures	1,159	631	2,515	1,915
Subordinated notes	1,164	1,164	3,492	3,492
Total interest expense	52,783	6,113	78,367	17,721
Net interest income	355,547	246,122	892,826	744,159
Credit loss expense	0	0	0	63
Net interest income after credit loss expense	355,547	246,122	892,826	744,096
Non-interest income:
Trust and investment management fees	38,552	37,381	114,984	110,569
Service charges on deposit accounts	22,960	21,216	69,570	61,058
Insurance commissions and fees	13,152	11,748	41,536	39,834
Interchange and card transaction fees	4,614	4,490	13,751	13,224
Other charges, commissions and fees	11,095	9,785	30,609	26,729
Net gain (loss) on securities transactions	0	0	0	0
Other	9,448	8,569	28,688	26,258
Total non-interest income	99,821	93,189	299,138	277,672
Non-interest expense:
Salaries and wages	127,189	99,463	355,399	289,956
Employee benefits	21,680	21,576	66,633	62,840
Net occupancy	28,133	27,208	83,923	79,909
Technology, furniture and equipment	30,781	28,494	89,859	84,508
Deposit insurance	4,279	3,088	11,636	8,893
Intangible amortization	103	157	380	544
Other	45,733	38,017	135,147	116,749
Total non-interest expense	257,898	218,003	742,977	643,399
Income before income taxes	197,470	121,308	448,987	378,369
Income taxes	27,710	13,333	61,011	36,311
Net income	169,760	107,975	387,976	342,058
Preferred stock dividends	1,668	1,668	5,006	5,488
Net income available to common shareholders	$ 168,092	$ 106,307	$ 382,970	$ 336,570
Earnings per common share:
Basic	$ 2.60	$ 1.66	$ 5.92	$ 5.25
Diluted	$ 2.59	$ 1.65	$ 5.90	$ 5.22