LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses Activity (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Allowance for credit losses:
Beginning balance	$ 33,619	$ 16,202	$ 16,202
Impact of adopting ASC 326		4,548	4,548
Provision for credit losses and Loans losses	(1,000)	13,500	13,200
Loans charged-off	(1,158)	(283)	(543)
Recoveries	87	152	212
Ending balance	31,548	34,119	33,619
Commercial and industrial
Allowance for credit losses:
Beginning balance	4,033	2,056	2,056
Impact of adopting ASC 326		546	546
Provision for credit losses and Loans losses	(329)	1,491	1,398
Loans charged-off	(238)	(43)	(68)
Recoveries	11	86	101
Ending balance	3,477	4,136	4,033
Construction and development
Allowance for credit losses:
Beginning balance	4,735	2,378	2,378
Impact of adopting ASC 326		323	323
Provision for credit losses and Loans losses	(914)	2,193	2,034
Recoveries	1
Ending balance	3,822	4,894	4,735
Commercial real estate
Allowance for credit losses:
Beginning balance	15,780	6,853	6,853
Impact of adopting ASC 326		2,228	2,228
Provision for credit losses and Loans losses	167	6,567	6,698
Loans charged-off	(760)
Recoveries	11		1
Ending balance	15,198	15,648	15,780
Farmland
Allowance for credit losses:
Beginning balance	1,220	570	570
Impact of adopting ASC 326		26	26
Provision for credit losses and Loans losses	19	654	624
Ending balance	1,239	1,250	1,220
1-4 family residential
Allowance for credit losses:
Beginning balance	6,313	3,125	3,125
Impact of adopting ASC 326		1,339	1,339
Provision for credit losses and Loans losses	(162)	1,729	1,915
Loans charged-off		(59)	(68)
Recoveries		2	2
Ending balance	6,151	6,136	6,313
Multi-family residential
Allowance for credit losses:
Beginning balance	363	409	409
Impact of adopting ASC 326		(50)	(50)
Provision for credit losses and Loans losses	255	245	4
Ending balance	618	604	363
Consumer
Allowance for credit losses:
Beginning balance	929	602	602
Impact of adopting ASC 326		72	72
Provision for credit losses and Loans losses	(34)	364	373
Loans charged-off	(76)	(80)	(155)
Recoveries	28	17	37
Ending balance	847	975	929
Agricultural
Allowance for credit losses:
Beginning balance	239	197	197
Impact of adopting ASC 326		73	73
Provision for credit losses and Loans losses	(49)	114	(33)
Loans charged-off		(18)	(18)
Recoveries		20	20
Ending balance	190	386	239
Overdrafts
Allowance for credit losses:
Beginning balance	7	12	12
Impact of adopting ASC 326		(9)	(9)
Provision for credit losses and Loans losses	47	60	187
Loans charged-off	(84)	(83)	(234)
Recoveries	36	27	51
Ending balance	$ 6	7	$ 7
Unallocated
Allowance for credit losses:
Provision for credit losses and Loans losses		83
Ending balance		$ 83