Consolidated Statements of Earnings - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
INTEREST INCOME:
Interest and fees on loans	$ 70,588	$ 66,372	$ 203,902	$ 195,299
Interest on investment securities:
Taxable	12,122	12,063	33,834	40,748
Exempt from federal income tax	14,249	12,877	42,058	34,721
Interest on federal funds sold and interest-bearing demand deposits in banks	239	61	616	903
Total interest income	97,198	91,373	280,410	271,671
INTEREST EXPENSE:
Interest on deposits	1,340	2,063	4,595	11,293
Other	76	100	260	1,030
Total interest expense	1,416	2,163	4,855	12,323
Net interest income	95,782	89,210	275,555	259,348
PROVISION FOR CREDIT LOSSES	0	9,000	(3,203)	27,550
Net interest income after provisions for credit losses	95,782	80,210	278,758	231,798
NONINTEREST INCOME:
Trust fees	9,484	7,461	26,475	21,859
Service charges on deposit accounts	5,673	5,009	15,394	15,242
ATM, interchange and credit card fees	9,793	8,644	28,323	24,093
Gain on sale and fees on mortgage loans	8,788	15,228	26,973	32,756
Net gain on sale of available-for-sale securities	1	36	814	3,610
Net gain on sale of foreclosed assets	27	19	83	72
Net gain (loss) on sale of assets	(6)	(2)	213	90
Interest on loan recoveries	1,746	202	2,832	621
Other	2,220	1,978	6,166	5,883
Total noninterest income	37,726	38,575	107,273	104,226
NONINTEREST EXPENSE:
Salaries, commissions and employee benefits	37,090	33,649	107,067	94,105
Net occupancy expense	3,288	3,193	9,676	9,321
Equipment expense	2,450	2,157	6,791	6,242
FDIC insurance premiums	815	587	2,282	1,095
ATM, interchange and credit card expenses	2,935	2,829	8,746	8,424
Professional and service fees	2,406	2,237	6,936	7,327
Printing, stationery and supplies	432	615	1,246	1,714
Operational and other losses	1,087	621	1,908	1,925
Software amortization and expense	2,855	2,265	8,303	6,299
Amortization of intangible assets	398	490	1,222	1,507
Other	9,183	6,950	25,859	26,274
Total noninterest expense	62,939	55,593	180,036	164,233
EARNINGS BEFORE INCOME TAXES	70,569	63,192	205,995	171,791
INCOME TAX EXPENSE	11,641	10,335	33,770	28,233
NET EARNINGS	$ 58,928	$ 52,857	$ 172,225	$ 143,558
NET EARNINGS PER SHARE, BASIC	$ 0.41	$ 0.37	$ 1.21	$ 1.01
NET EARNINGS PER SHARE, DILUTED	0.41	0.37	1.20	1.01
DIVIDENDS PER SHARE	$ 0.15	$ 0.13	$ 0.43	$ 0.38