LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Activity in Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 31,001	$ 29,251	$ 29,251
Provision for Credit Losses	635	1,083
Charge-Offs	(1,796)	(1,611)
Recoveries	1,159	1,011
Net (Charge-Offs) Recoveries	(637)	(600)
Ending Balance	30,999	29,734	31,001
Commercial, Financial and Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1,751	1,514	1,514
Provision for Credit Losses	137	47
Charge-Offs	(300)	(168)	(782)
Recoveries	74	75
Net (Charge-Offs) Recoveries	(226)	(93)
Ending Balance	1,662	1,468	1,751
Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1,681	2,384	2,384
Provision for Credit Losses	(298)	(151)
Charge-Offs	0	0
Recoveries	0	0
Net (Charge-Offs) Recoveries	0	0
Ending Balance	1,383	2,233	1,681
Real Estate - Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	6,859	5,867	5,867
Provision for Credit Losses	(364)	191
Charge-Offs	0	0	(4)
Recoveries	84	3
Net (Charge-Offs) Recoveries	84	3
Ending Balance	6,579	6,061	6,859
Real Estate - Residential [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	15,317	14,568	14,568
Provision for Credit Losses	670	206
Charge-Offs	0	(8)	(136)
Recoveries	77	119
Net (Charge-Offs) Recoveries	77	111
Ending Balance	16,064	14,885	15,317
Real Estate - Home Equity [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,368	1,952	1,952
Provision for Credit Losses	8	68
Charge-Offs	(13)	0	(44)
Recoveries	10	9
Net (Charge-Offs) Recoveries	(3)	9
Ending Balance	2,373	2,029	2,368
Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	3,025	2,966	2,966
Provision for Credit Losses	482	722
Charge-Offs	(1,483)	(1,435)	(5,954)
Recoveries	914	805
Net (Charge-Offs) Recoveries	(569)	(630)
Ending Balance	$ 2,938	$ 3,058	$ 3,025