SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financial results by reportable segments [Abstract]
Net interest income (expense)		$ 121,764	$ 122,285	$ 104,575
Provision for loan loss	$ (2,000)	1,918	(25,570)	(2,799)
Noninterest income		97,469	101,603	56,633
Noninterest expense		(148,030)	(141,715)	(121,708)
Income before income taxes		73,121	56,603	36,701
Income tax (expense) benefit		(14,507)	(11,250)	(7,481)
Net income		58,614	45,353	29,220
Total assets		3,901,855	3,599,160	3,237,167
Banking [Member] | Operating Segments [Member]
Financial results by reportable segments [Abstract]
Net interest income (expense)		121,764	122,285	104,575
Provision for loan loss		1,918	(25,570)	(2,799)
Noninterest income		89,334	94,010	49,834
Noninterest expense		(142,111)	(135,985)	(117,160)
Income before income taxes		70,905	54,740	34,450
Income tax (expense) benefit		(14,091)	(10,804)	(7,097)
Net income		56,814	43,936	27,353
Total assets		3,890,751	3,584,828	3,224,396
Insurance [Member] | Operating Segments [Member]
Financial results by reportable segments [Abstract]
Net interest income (expense)		0	0	0
Provision for loan loss		0	0	0
Noninterest income		8,135	7,593	6,799
Noninterest expense		(5,919)	(5,730)	(4,548)
Income before income taxes		2,216	1,863	2,251
Income tax (expense) benefit		(416)	(446)	(384)
Net income		1,800	1,417	1,867
Total assets		$ 11,104	$ 14,332	$ 12,771