Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest income
Interest and fees on loans	$ 279,896	$ 180,837
Interest on federal funds sold and other short-term investments	10,983	2,329
Interest and dividends on securities:
Taxable	36,259	17,505
Tax-exempt	2,165	2,124
Total interest income	329,303	202,795
Interest expense
Interest on deposits	68,592	8,561
Interest on short-term borrowings	1,157	181
Interest on long-term borrowings	25,234	2,551
Total interest expense	94,983	11,293
Net interest income	234,320	191,502
Provision for credit losses	6,890	(3,410)
Net interest income after provision for credit losses	227,430	194,912
Other income
Income from bank-owned life insurance	1,891	2,194
Mortgage loan servicing income	2,276	2,387
Net investment securities losses	(405)	(251)
Other income	1,411	1,527
Total other income	32,744	46,025
Other expense
Employee compensation	55,414	62,621
Employee benefits	13,435	12,851
Net occupancy expense	11,833	11,187
Other real estate owned ("OREO") expense	667	182
Net gains on the sales of OREO properties	(43)	(33)
Equipment expense	6,996	7,335
Data processing expense	7,473	7,371
Mortgage loan servicing expense and impairment	1,884	1,643
Bankcard processing expense	522	424
FDIC insurance expense	4,587	2,673
Other expense	34,651	32,921
Total other expense	137,419	139,175
Income before income taxes	122,755	101,762
Income taxes	24,448	20,098
Net income (loss)	$ 98,307	$ 81,664
Earnings per common share:
Basic	$ 0.73	$ 0.6
Diluted	$ 0.73	$ 0.6
Average outstanding shares:
Basic	134,411,166	136,058,328
Diluted	134,840,328	136,435,229
Fees from trust services [Member]
Other income
Revenue from contract	$ 4,780	$ 4,127
Fees from brokerage services [Member]
Other income
Revenue from contract	4,200	4,552
Fees from deposit services [Member]
Other income
Revenue from contract	9,362	10,148
Bankcard fees and merchant discounts [Member]
Other income
Revenue from contract	1,707	1,379
Other service charges, commissions, and fees [Member]
Other income
Revenue from contract	1,138	759
Income from mortgage banking activities [Member]
Other income
Revenue from contract	$ 6,384	$ 19,203