Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Interest income:
Loans	$ 276,041	$ 274,324	$ 546,825	$ 539,618
Investment securities
Taxable	26,444	32,587	53,877	65,816
Tax-exempt	7,626	7,769	15,276	15,572
Deposits – other banks	8,951	12,564	15,571	23,092
Federal funds sold	53	59	108	120
Total interest income	319,115	327,303	631,657	644,218
Interest expense:
Interest on deposits	88,489	95,741	175,275	188,289
FHLB and other borrowed funds	5,539	14,255	11,441	28,531
Securities sold under agreements to repurchase	1,012	1,363	2,086	2,767
Subordinated debentures	4,123	4,122	8,247	8,219
Total interest expense	99,163	115,481	197,049	227,806
Net interest income	219,952	211,822	434,608	416,412
Provision for credit losses on loans	3,000	8,000	3,000	13,500
Recovery of credit losses on unfunded commitments	0	0	0	(1,000)
Total credit loss expense	3,000	8,000	3,000	12,500
Net interest income after credit loss expense	216,952	203,822	431,608	403,912
Non-interest income:
Trust fees	5,234	4,722	9,994	9,788
Mortgage lending income	4,780	4,276	8,379	7,834
Insurance commissions	589	565	1,124	1,073
Increase in cash value of life insurance	1,415	1,279	3,257	2,474
Dividends from FHLB, FRB, FNBB & other	2,657	2,998	5,375	6,005
Gain on sale of SBA loans	0	56	288	254
Gain on sale of branches, equipment and other assets, net	972	2,052	809	2,044
Gain (loss) on OREO, net	13	49	(363)	66
Fair value adjustment for marketable securities	(238)	(274)	204	729
Other income	13,462	6,658	24,904	14,038
Total non-interest income	51,079	42,774	96,505	84,573
Non-interest expense:
Salaries and employee benefits	64,318	60,427	126,173	121,337
Occupancy and equipment	14,023	14,408	28,448	28,959
Data processing expense	8,364	8,935	16,922	18,082
Other operating expenses	29,335	29,415	57,425	56,303
Total non-interest expense	116,040	113,185	228,968	224,681
Income before income taxes	151,991	133,411	299,145	263,804
Income tax expense	33,588	31,881	65,533	62,165
Net income	$ 118,403	$ 101,530	$ 233,612	$ 201,639
Basic earnings per share (in dollars per share)	$ 0.60	$ 0.51	$ 1.18	$ 1.00
Diluted earnings per share (in dollars per share)	$ 0.60	$ 0.51	$ 1.18	$ 1.00
Service charges on deposit accounts
Non-interest income:
Service charges	$ 9,552	$ 9,714	$ 19,202	$ 19,400
Other service charges and fees
Non-interest income:
Service charges	$ 12,643	$ 10,679	$ 23,332	$ 20,868