Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
INTEREST INCOME:
Interest and fees on loans	$ 405,939	$ 296,114	$ 271,638
Interest on investment securities:
Taxable	79,925	78,924	47,390
Exempt from federal income tax	36,194	54,121	56,638
Interest on federal funds sold and interest-bearing deposits in banks	6,012	3,695	739
Total interest income	528,070	432,854	376,405
INTEREST EXPENSE:
Interest on deposits	124,830	26,246	5,705
Interest on borrowings	19,431	5,194	337
Total interest expense	144,261	31,440	6,042
Net interest income	383,809	401,414	370,363
PROVISION FOR CREDIT LOSSES	10,631	17,427	(1,139)
Net interest income after provisions for credit losses	373,178	383,987	371,502
NONINTEREST INCOME:
Trust fees	40,456	39,995	36,145
Service charges on deposit accounts	25,378	24,540	21,156
Debit card fees	21,721	30,280	35,905
Credit card fees	2,645	2,585	2,373
Gain on sale and fees on mortgage loans	11,890	19,035	33,245
Net gain (loss) on sale of available-for-sale securities	(7,119)	2,144	815
Net gain on sale of foreclosed assets	46	1,451	190
Net gain on sale of assets	1,525	520	210
Interest on loan recoveries	2,055	2,840	4,039
Other	9,406	8,275	8,098
Total noninterest income	108,003	131,665	142,176
NONINTEREST EXPENSE:
Salaries, commissions and employee benefits	131,915	134,133	142,042
Net occupancy expense	13,766	13,307	13,009
Equipment expense	8,545	9,052	9,173
FDIC insurance premiums	7,749	3,711	3,130
Debit card expense	12,933	12,231	11,957
Professional and service fees	9,810	8,770	9,334
Printing, stationery and supplies	2,454	2,114	1,910
Operational and other losses	3,842	3,229	3,293
Software amortization and expense	10,288	9,963	11,120
Amortization of intangible assets	912	1,245	1,613
Other	35,668	37,023	35,127
Total noninterest expense	237,882	234,778	241,708
EARNINGS BEFORE INCOME TAXES	243,299	280,874	271,970
INCOME TAX EXPENSE	44,322	46,399	44,408
NET EARNINGS	$ 198,977	$ 234,475	$ 227,562
NET EARNINGS PER SHARE, BASIC	$ 1.39	$ 1.64	$ 1.60
NET EARNINGS PER SHARE, DILUTED	1.39	1.64	1.59
DIVIDENDS PER SHARE	$ 0.71	$ 0.66	$ 0.58