LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Activity in the allowance for credit losses) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 20,756,000	$ 22,026,000	$ 21,606,000	$ 23,816,000
Provision for Credit Losses	1,670,000	(184,000)	1,591,000	(2,496,000)
Charge-Offs	(2,297,000)	(841,000)	(4,071,000)	(1,977,000)
Recoveries	1,152,000	1,174,000	2,155,000	2,832,000
Net (Charge-Offs) Recoveries	(1,145,000)	333,000	(1,916,000)	855,000
Ending Balance	21,281,000	22,175,000	21,281,000	22,175,000
Commercial, Financial and Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,122,000	1,957,000	2,191,000	2,204,000
Provision for Credit Losses	564,000	(56,000)	403,000	(370,000)
Charge-Offs	(1,104,000)	(32,000)	(1,177,000)	(101,000)
Recoveries	59,000	103,000	224,000	239,000
Net (Charge-Offs) Recoveries	(1,045,000)	71,000	(953,000)	138,000
Ending Balance	1,641,000	1,972,000	1,641,000	1,972,000
Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,596,000	2,254,000	3,302,000	2,479,000
Provision for Credit Losses	542,000	505,000	(172,000)	280,000
Charge-Offs	0	0	0	0
Recoveries	0	0	8,000	0
Net (Charge-Offs) Recoveries	0	0	8,000	0
Ending Balance	3,138,000	2,759,000	3,138,000	2,759,000
Real Estate - Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	5,392,000	6,956,000	5,810,000	7,029,000
Provision for Credit Losses	(396,000)	587,000	(577,000)	(131,000)
Charge-Offs	0	0	(266,000)	0
Recoveries	56,000	26,000	85,000	671,000
Net (Charge-Offs) Recoveries	56,000	26,000	(181,000)	671,000
Ending Balance	5,052,000	7,569,000	5,052,000	7,569,000
Real Estate - Residential [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	4,470,000	5,204,000	4,129,000	5,440,000
Provision for Credit Losses	1,060,000	(1,030,000)	1,374,000	(1,335,000)
Charge-Offs	0	(65,000)	0	(71,000)
Recoveries	115,000	244,000	142,000	319,000
Net (Charge-Offs) Recoveries	115,000	179,000	142,000	248,000
Ending Balance	5,645,000	4,353,000	5,645,000	4,353,000
Real Estate - Home Equity [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1,916,000	2,575,000	2,296,000	3,111,000
Provision for Credit Losses	(223,000)	(114,000)	(628,000)	(769,000)
Charge-Offs	0	(74,000)	(33,000)	(79,000)
Recoveries	67,000	70,000	125,000	194,000
Net (Charge-Offs) Recoveries	67,000	(4,000)	92,000	115,000
Ending Balance	1,760,000	2,457,000	1,760,000	2,457,000
Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	4,260,000	3,080,000	3,878,000	3,553,000
Provision for Credit Losses	123,000	(76,000)	1,191,000	(171,000)
Charge-Offs	(1,193,000)	(670,000)	(2,595,000)	(1,726,000)
Recoveries	855,000	731,000	1,571,000	1,409,000
Net (Charge-Offs) Recoveries	(338,000)	61,000	(1,024,000)	(317,000)
Ending Balance	$ 4,045,000	$ 3,065,000	$ 4,045,000	$ 3,065,000