LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Loan Losses Activity (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2019	Jun. 30, 2020	Dec. 31, 2019
Allowance for credit losses:
Beginning balance	$ 14,651	$ 16,202	$ 14,651
Impact of adopting ASC 326		4,548
Provision for credit losses and Loans losses	1,150	13,500	1,250
Loans charged-off	(165)	(283)	(453)
Recoveries	107	152	754
Ending balance	15,743	34,119	16,202
Commercial and industrial
Allowance for credit losses:
Beginning balance	1,751	2,056	1,751
Impact of adopting ASC 326		546
Provision for credit losses and Loans losses	297	1,491	(117)
Loans charged-off	(49)	(43)	(86)
Recoveries	12	86	508
Ending balance	2,011	4,136	2,056
Construction and development
Allowance for credit losses:
Beginning balance	1,920	2,378	1,920
Impact of adopting ASC 326		323
Provision for credit losses and Loans losses	(45)	2,193	458
Ending balance	1,875	4,894	2,378
Commercial real estate
Allowance for credit losses:
Beginning balance	6,025	6,853	6,025
Impact of adopting ASC 326		2,228
Provision for credit losses and Loans losses	747	6,567	827
Recoveries	1		1
Ending balance	6,773	15,648	6,853
Farmland
Allowance for credit losses:
Beginning balance	643	570	643
Impact of adopting ASC 326		26
Provision for credit losses and Loans losses	15	654	(73)
Ending balance	658	1,250	570
1-4 family residential
Allowance for credit losses:
Beginning balance	2,868	3,125	2,868
Impact of adopting ASC 326		1,339
Provision for credit losses and Loans losses	61	1,729	268
Loans charged-off	(6)	(59)	(14)
Recoveries	3	2	3
Ending balance	2,926	6,136	3,125
Multi-family residential
Allowance for credit losses:
Beginning balance	631	409	631
Impact of adopting ASC 326		(50)
Provision for credit losses and Loans losses	45	245	(222)
Ending balance	676	604	409
Consumer
Allowance for credit losses:
Beginning balance	565	602	565
Impact of adopting ASC 326		72
Provision for credit losses and Loans losses	(410)	364	(2)
Loans charged-off	(18)	(80)	(72)
Recoveries	67	17	111
Ending balance	204	975	602
Agricultural
Allowance for credit losses:
Beginning balance	238	197	238
Impact of adopting ASC 326		73
Provision for credit losses and Loans losses	375	114	(41)
Loans charged-off		(18)	(89)
Recoveries		20	89
Ending balance	613	386	197
Overdrafts
Allowance for credit losses:
Beginning balance	10	12	10
Impact of adopting ASC 326		(9)
Provision for credit losses and Loans losses	65	60	152
Loans charged-off	(92)	(83)	(192)
Recoveries	24	27	42
Ending balance	$ 7	7	$ 12
Specific Unallocated COVID-19 reserve
Allowance for credit losses:
Provision for credit losses and Loans losses		83
Ending balance		$ 83