LOANS HELD FOR INVESTMENT, Activity in ACL for Loans (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Mar. 31, 2024		Mar. 31, 2023		Dec. 31, 2023
LOANS HELD FOR INVESTMENT [Abstract]
Ratio of ACL for loans to loans held for investment	1.40%				1.41%
Allowance for Credit Losses [Roll Forward]
Beginning Balance	$ 42,356		$ 39,288		$ 39,288
Provision for credit losses	765	[1]	800	[2]
Charge-offs	(1,139)		(939)
Recoveries	192		309
Ending Balance	42,174		39,560		42,356
Provision for credit losses	830		1,010
Provision for off-balance sheet credit exposures	65		210
Impact of CECL Adoption [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance			102		102
Commercial Real Estate [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance	15,808		13,029		13,029
Provision for credit losses	62	[1]	(475)	[2]
Charge-offs	(86)		0		0
Recoveries	0		0
Ending Balance	15,784		13,381		15,808
Commercial Real Estate [Member] | Impact of CECL Adoption [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance			827		827
Commercial [Member] | Specialized [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance	4,020		3,425		3,425
Provision for credit losses	(205)	[1]	(11)	[2]
Charge-offs	0		0		(11)
Recoveries	33		63
Ending Balance	3,848		3,510		4,020
Commercial [Member] | Specialized [Member] | Impact of CECL Adoption [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance			33		33
Commercial [Member] | General [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance	6,391		9,215		9,215
Provision for credit losses	659	[1]	(237)	[2]
Charge-offs	(375)		(199)		(469)
Recoveries	33		62
Ending Balance	6,708		6,267		6,391
Commercial [Member] | General [Member] | Impact of CECL Adoption [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance			(2,574)		(2,574)
Consumer [Member] | 1-4 Family Residential [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance	9,177		6,194		6,194
Provision for credit losses	273	[1]	635	[2]
Charge-offs	(172)		0		(1)
Recoveries	2		2
Ending Balance	9,280		8,531		9,177
Consumer [Member] | 1-4 Family Residential [Member] | Impact of CECL Adoption [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance			1,700		1,700
Consumer [Member] | Auto Loans [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance	3,601		3,926		3,926
Provision for credit losses	(27)	[1]	298	[2]
Charge-offs	(224)		(254)		(888)
Recoveries	65		76
Ending Balance	3,415		3,714		3,601
Consumer [Member] | Auto Loans [Member] | Impact of CECL Adoption [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance			(332)		(332)
Consumer [Member] | Other Consumer [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance	968		1,376		1,376
Provision for credit losses	238	[1]	68	[2]
Charge-offs	(282)	[3]	(214)		(1,140)	[4]
Recoveries	59		106
Ending Balance	983		1,101		968
Consumer [Member] | Other Consumer [Member] | Impact of CECL Adoption [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance			(235)		(235)
Construction [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance	2,391		2,123		2,123
Provision for credit losses	(235)	[1]	522	[2]
Charge-offs	0		(272)		(319)
Recoveries	0		0
Ending Balance	$ 2,156		3,056		2,391
Construction [Member] | Impact of CECL Adoption [Member]
Allowance for Credit Losses [Roll Forward]
Beginning Balance			$ 683		$ 683

[1] The $830 thousand provision for credit loss on the consolidated statement of comprehensive income (loss) includes a $765 thousand provision for credit losses on loans and a $65 thousand provision for off-balance sheet credit exposures for the three months ended March 31, 2024.

[2] The $1.0 million provision for credit loss on the consolidated statement of comprehensive income (loss) includes a $800 thousand provision for credit losses on loans and a $210 thousand provision for off-balance sheet credit exposures for the three months ended March 31, 2023.

[3] Includes $62 thousand in charged-off demand deposit overdrafts reported as 2024 originations.

[4] Includes $574 thousand in charged-off demand deposit overdrafts reported as 2023 originations.