LOANS HELD FOR INVESTMENT, Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
LOANS HELD FOR INVESTMENT [Abstract]
Ratio of allowance for loan losses to loans held for investment	1.47%		1.47%		1.73%
Allowance for Loan Losses [Roll Forward]
Beginning Balance	$ 39,785	$ 42,963	$ 42,098	$ 45,553
Provision for loan losses	(782)	0	(2,867)	(1,918)
Charge-offs	(546)	(342)	(1,756)	(1,480)
Recoveries	1,200	147	2,182	613
Ending Balance	39,657	42,768	39,657	42,768
Commercial Real Estate [Member]
Allowance for Loan Losses [Roll Forward]
Beginning Balance	13,903	17,288	17,245	18,962
Provision for loan losses	(1,292)	960	(5,052)	(714)
Charge-offs	0	0	0	0
Recoveries	0	0	418	0
Ending Balance	12,611	18,248	12,611	18,248
Commercial [Member] | Specialized [Member]
Allowance for Loan Losses [Roll Forward]
Beginning Balance	3,355	4,823	4,363	5,760
Provision for loan losses	(481)	(596)	(1,494)	(1,627)
Charge-offs	(43)	(16)	(149)	(21)
Recoveries	874	20	985	119
Ending Balance	3,705	4,231	3,705	4,231
Commercial [Member] | General [Member]
Allowance for Loan Losses [Roll Forward]
Beginning Balance	9,918	8,948	8,466	9,227
Provision for loan losses	372	(838)	1,883	(870)
Charge-offs	0	(2)	(315)	(379)
Recoveries	135	63	391	193
Ending Balance	10,425	8,171	10,425	8,171
Consumer [Member] | 1-4 Family Residential [Member]
Allowance for Loan Losses [Roll Forward]
Beginning Balance	5,329	5,064	5,268	4,646
Provision for loan losses	247	135	346	602
Charge-offs	(52)	0	(92)	(52)
Recoveries	37	2	39	5
Ending Balance	5,561	5,201	5,561	5,201
Consumer [Member] | Auto Loans [Member]
Allowance for Loan Losses [Roll Forward]
Beginning Balance	3,958	3,815	3,653	4,226
Provision for loan losses	(39)	79	344	(88)
Charge-offs	(77)	(111)	(233)	(438)
Recoveries	50	20	128	103
Ending Balance	3,892	3,803	3,892	3,803
Consumer [Member] | Other Consumer [Member]
Allowance for Loan Losses [Roll Forward]
Beginning Balance	1,443	1,434	1,357	1,671
Provision for loan losses	282	139	678	132
Charge-offs	(374)	(213)	(801)	(590)
Recoveries	104	42	221	189
Ending Balance	1,455	1,402	1,455	1,402
Construction [Member]
Allowance for Loan Losses [Roll Forward]
Beginning Balance	1,879	1,591	1,746	1,061
Provision for loan losses	129	121	428	647
Charge-offs	0	0	(166)	0
Recoveries	0	0	0	4
Ending Balance	$ 2,008	$ 1,712	$ 2,008	$ 1,712