FAIR VALUE DISCLOSURES, Estimated Fair Values, and Related Carrying Amounts (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Carrying Amount [Member]
Financial assets [Abstract]
Cash and cash equivalents	$ 352,424	$ 234,883
Loans held for investment, net	2,951,488	2,708,793
Loans held for sale (best efforts)	5,777	20,365
Accrued interest receivable	17,672	16,432
Financial liabilities [Abstract]
Deposits	3,620,614	3,406,430
Accrued interest payable	3,922	2,836
Junior subordinated deferrable interest debentures	46,393	46,393
Subordinated debt securities	76,100	75,961
Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	352,424	234,883
Loans held for investment, net	2,893,974	2,662,609
Loans held for sale (best efforts)	5,913	20,745
Accrued interest receivable	17,672	16,432
Financial liabilities [Abstract]
Deposits	3,619,724	3,405,222
Accrued interest payable	3,922	2,836
Junior subordinated deferrable interest debentures	33,321	34,606
Subordinated debt securities	67,262	70,835
Level 1 [Member] | Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	352,424	234,883
Loans held for investment, net	0	0
Loans held for sale (best efforts)	0	0
Accrued interest receivable	0	0
Financial liabilities [Abstract]
Deposits	0	0
Accrued interest payable	0	0
Junior subordinated deferrable interest debentures	0	0
Subordinated debt securities	0	0
Level 2 [Member] | Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Loans held for investment, net	0	0
Loans held for sale (best efforts)	5,913	20,745
Accrued interest receivable	17,672	16,432
Financial liabilities [Abstract]
Deposits	3,619,724	3,405,222
Accrued interest payable	3,922	2,836
Junior subordinated deferrable interest debentures	33,321	34,606
Subordinated debt securities	67,262	70,835
Level 3 [Member] | Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Loans held for investment, net	2,893,974	2,662,609
Loans held for sale (best efforts)	0	0
Accrued interest receivable	0	0
Financial liabilities [Abstract]
Deposits	0	0
Accrued interest payable	0	0
Junior subordinated deferrable interest debentures	0	0
Subordinated debt securities	$ 0	$ 0