SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financial results by reportable segments [Abstract]
Net interest income	$ 31,178		$ 31,273	$ 90,315	$ 91,920
Provision for loan loss	0	$ (2,000)	(6,062)	1,918	(25,429)
Noninterest income	25,791		31,660	74,541	75,431
Noninterest expense	(38,063)		(35,993)	(111,898)	(105,211)
Income before income taxes	18,906		20,878	54,876	36,711
Income tax (expense) benefit	(3,716)		(4,147)	(10,876)	(7,282)
Net income	15,190		16,731	44,000	29,429
Banking [Member] | Operating Segments [Member]
Financial results by reportable segments [Abstract]
Net interest income	31,178		31,273	90,315	91,920
Provision for loan loss	0		(6,062)	1,918	(25,429)
Noninterest income	22,043		28,393	68,536	70,050
Noninterest expense	(35,613)		(33,984)	(107,233)	(100,876)
Income before income taxes	17,608		19,620	53,536	35,665
Income tax (expense) benefit	(3,495)		(3,891)	(10,645)	(7,008)
Net income	14,113		15,729	42,891	28,657
Insurance [Member] | Operating Segments [Member]
Financial results by reportable segments [Abstract]
Net interest income	0		0	0	0
Provision for loan loss	0		0	0	0
Noninterest income	3,748		3,267	6,005	5,381
Noninterest expense	(2,450)		(2,009)	(4,665)	(4,335)
Income before income taxes	1,298		1,258	1,340	1,046
Income tax (expense) benefit	(221)		(256)	(231)	(274)
Net income	$ 1,077		$ 1,002	$ 1,109	$ 772