Consolidated Statements of Earnings - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
INTEREST INCOME:
Interest and fees on loans	$ 68,158,000	$ 66,879,000	$ 132,656,000	$ 133,314,000
Interest on investment securities:
Taxable	19,151,000	11,449,000	36,974,000	21,712,000
Exempt from federal income tax	14,120,000	14,060,000	28,712,000	27,809,000
Interest on federal funds sold and interest-bearing demand deposits in banks	552,000	214,000	648,000	377,000
Total interest income	101,981,000	92,602,000	198,990,000	183,212,000
INTEREST EXPENSE:
Interest on deposits	2,966,000	1,560,000	4,336,000	3,255,000
Other	233,000	93,000	433,000	184,000
Total interest expense	3,199,000	1,653,000	4,769,000	3,439,000
Net interest income	98,782,000	90,949,000	194,221,000	179,773,000
Provision for Credit losses	5,350,000	(1,206,000)	10,132,000	(3,203,000)
Net interest income after provision for credit losses	93,432,000	92,155,000	184,089,000	182,976,000
NONINTEREST INCOME:
Trust fees	9,742,000	8,692,000	19,559,000	16,991,000
Service charges on deposit accounts	6,038,000	4,928,000	11,744,000	9,721,000
ATM, interchange and credit card fees	10,568,000	9,853,000	20,096,000	18,530,000
Gain on sale and fees on mortgage loans	5,728,000	8,291,000	12,061,000	18,185,000
Net gain on sale of available-for-sale securities	1,648,000	5,000	1,679,000	813,000
Net gain on sale of foreclosed assets	18,000	1,000	1,102,000	56,000
Net gain (loss) on sale of other assets	6,000	74,000	(4,000)	219,000
Interest on loan recoveries	1,649,000	704,000	1,932,000	1,086,000
Other	1,920,000	2,125,000	4,029,000	3,947,000
Total noninterest income	37,317,000	34,673,000	72,198,000	69,548,000
NONINTEREST EXPENSE:
Salaries, commissions and employee benefits	33,147,000	35,046,000	67,285,000	69,977,000
Net occupancy expense	3,292,000	3,241,000	6,517,000	6,388,000
Equipment expense	2,346,000	2,177,000	4,603,000	4,341,000
FDIC insurance premiums	904,000	766,000	1,773,000	1,467,000
ATM, interchange and credit card expenses	3,201,000	3,039,000	6,169,000	5,811,000
Professional and service fees	2,191,000	2,392,000	4,415,000	4,531,000
Printing, stationery and supplies	501,000	489,000	1,041,000	814,000
Operational and other losses	782,000	534,000	1,378,000	821,000
Software amortization and expense	2,522,000	2,829,000	4,979,000	5,448,000
Amortization of intangible assets	320,000	412,000	640,000	824,000
Other	9,127,000	8,449,000	18,758,000	16,676,000
Total noninterest expense	58,333,000	59,374,000	117,558,000	117,098,000
EARNINGS BEFORE INCOME TAXES	72,416,000	67,454,000	138,729,000	135,426,000
INCOME TAX EXPENSE	11,922,000	11,075,000	22,263,000	22,129,000
NET EARNINGS	$ 60,494,000	$ 56,379,000	$ 116,466,000	$ 113,297,000
NET EARNINGS PER SHARE, BASIC	$ 0.42	$ 0.40	$ 0.82	$ 0.80
NET EARNINGS PER SHARE, DILUTED	0.42	0.39	0.81	0.79
DIVIDENDS PER SHARE	$ 0.17	$ 0.15	$ 0.32	$ 0.28