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	$ 104,818	$ 88,280	$ 273,936	$ 272,210
Investment securities:
Taxable	20,718	11,669	50,846	21,558
Tax-exempt	625	360	1,326	1,132
Other interest income	18,926	883	24,995	2,145
Total interest income	145,087	101,192	351,103	297,045
Interest expense:
Savings deposits	3,323	1,082	5,720	3,001
Time deposits	2,530	2,814	7,311	8,941
Securities sold under repurchase agreements	665	165	1,090	448
Other borrowings	1,926	1,929	5,721	5,726
Junior subordinated deferrable interest debentures	1,426	692	3,097	2,102
Total interest expense	9,870	6,682	22,939	20,218
Net interest income	135,217	94,510	328,164	276,827
Provision for credit losses	8,525	2,801	13,741	5,137
Net interest income after provision for credit losses	126,692	91,709	314,423	271,690
Non-interest income:
Investment securities transactions, net		(12)		(16)
Other investments, net	6,962	5,490	11,063	68,495
Other income	9,989	6,641	27,879	17,905
Total non-interest income	54,602	47,209	141,356	181,352
Non-interest expense:
Employee compensation and benefits	34,341	30,552	96,505	91,262
Occupancy	7,821	6,491	20,282	18,638
Depreciation of bank premises and equipment	5,425	6,028	16,355	19,263
Professional fees	3,087	2,558	8,347	7,675
Deposit insurance assessments	2,026	1,026	5,062	2,840
Net operations, other real estate owned	(253)	438	(708)	5,351
Advertising	1,476	1,470	4,371	4,349
Software and software maintenance	4,089	4,115	12,638	13,081
Other	17,161	17,049	45,195	39,407
Total non-interest expense	75,173	69,727	208,047	201,866
Income before income taxes	106,121	69,191	247,732	251,176
Provision for income taxes	22,765	14,592	52,912	53,780
Net income	$ 83,356	$ 54,599	$ 194,820	$ 197,396
Basic earnings per common share:
Weighted average number of shares outstanding (in shares)	62,226,521	63,372,777	62,838,831	63,347,922
Net income per common share (in dollars per share)	$ 1.34	$ 0.86	$ 3.10	$ 3.12
Fully diluted earnings per common share:
Weighted average number of shares outstanding (in shares)	62,371,475	63,498,542	62,980,934	63,475,393
Net income per common share (in dollars per share)	$ 1.34	$ 0.86	$ 3.09	$ 3.11
Services charges on deposit accounts
Non-interest income:
Service charges	$ 19,038	$ 17,294	$ 54,543	$ 47,971
Other service charges, commissions and fees, Banking
Non-interest income:
Service charges	15,995	15,750	41,446	41,166
Other service charges, commissions and fees, Non-banking
Non-interest income:
Service charges	$ 2,618	$ 2,046	$ 6,425	$ 5,831