Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest income:
Loans, including fees	$ 269,715	$ 149,977
Securities:
Taxable	97,775	43,058
Tax-exempt	66,634	56,866
Interest-bearing deposits	99,245	6,343
Federal funds sold	758	13
Resell agreements	1,068	4
Total interest income	535,195	256,261
Interest expense:
Deposits	97,989	4,912
Federal funds purchased	583	12
Repurchase agreements	33,651	518
Junior subordinated deferrable interest debentures	1,988	584
Subordinated notes	1,164	1,164
Total interest expense	135,375	7,190
Net interest income	399,820	249,071
Credit loss expense	9,104	0
Net interest income after credit loss expense	390,716	249,071
Non-interest income:
Trust and investment management fees	36,144	38,656
Service charges on deposit accounts	21,879	22,740
Insurance commissions and fees	18,952	16,608
Interchange and card transaction fees	4,889	4,226
Other charges, commissions and fees	11,704	9,627
Net gain (loss) on securities transactions	21	0
Other	11,676	9,533
Total non-interest income	105,265	101,390
Non-interest expense:
Salaries and wages	130,345	111,329
Employee benefits	33,922	24,220
Net occupancy	30,349	27,411
Technology, furniture and equipment	32,481	29,157
Deposit insurance	6,245	3,633
Intangible amortization	96	146
Other	51,704	42,836
Total non-interest expense	285,142	238,732
Income before income taxes	210,839	111,729
Income taxes	33,186	12,627
Net income	177,653	99,102
Preferred stock dividends	1,669	1,669
Net income available to common shareholders	$ 175,984	$ 97,433
Earnings per common share:
Basic	$ 2.71	$ 1.51
Diluted	$ 2.70	$ 1.50