Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest Income
Investment securities	$ 169,035	$ 122,099	$ 99,616
Residential real estate loans	57,243	43,300	46,392
Commercial loans	548,969	471,061	436,497
Consumer and other loans	54,393	44,614	44,559
Total interest income	829,640	681,074	627,064
Interest Expense
Deposits	14,526	12,135	17,620
Securities sold under agreements to repurchase	3,200	2,303	3,601
Federal Home Loan Bank advances	17,317	0	733
Other borrowed funds	1,329	713	646
Subordinated debentures	4,889	3,407	4,715
Total interest expense	41,261	18,558	27,315
Net Interest Income	788,379	662,516	599,749
Provision for credit losses	19,963	23,076	39,765
Net interest income after provision for credit losses	768,416	639,440	559,984
Non-Interest Income
Service charges and other fees	72,124	59,317	52,503
Miscellaneous loan fees and charges	15,350	12,038	7,344
Gain on sale of loans	20,032	63,063	99,450
Gain (loss) on sale of debt securities	620	(638)	1,139
Other income	12,606	11,040	12,431
Total non-interest income	120,732	144,820	172,867
Non-Interest Expense
Compensation and employee benefits	319,303	270,644	253,047
Occupancy and equipment	43,261	39,394	37,673
Advertising and promotions	14,324	11,949	10,201
Data processing	30,823	23,470	21,132
Other real estate owned and foreclosed assets	77	236	923
Regulatory assessments and insurance	12,904	8,249	4,656
Aggregate amortization expense	10,658	10,271	10,370
Other expenses	87,518	70,609	66,809
Total non-interest expense	518,868	434,822	404,811
Income Before Income Taxes	370,280	349,438	328,040
Federal and state income tax expense	67,078	64,681	61,640
Net Income	$ 303,202	$ 284,757	$ 266,400
Basic earnings per share (in dollars per share)	$ 2.74	$ 2.87	$ 2.81
Diluted earnings per share (in dollars per share)	2.74	2.86	2.81
Dividends declared per share (in dollars per share)	$ 1.32	$ 1.37	$ 1.33
Average outstanding shares - basic (in shares)	110,757,473	99,313,255	94,883,864
Average outstanding shares - diluted (in shares)	110,827,933	99,398,250	94,932,353