FAIR VALUE DISCLOSURES, Estimated Fair Values, and Related Carrying Amounts (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Carrying Amount [Member]
Financial assets [Abstract]
Cash and cash equivalents	$ 371,939	$ 330,158
Loans held for investment, net	2,969,625	2,971,797
Loans held for sale (best efforts)	6,065	7,884
Accrued interest receivable	16,605	20,881
Financial liabilities [Abstract]
Deposits	3,638,571	3,626,153
Accrued interest payable	4,229	5,057
Junior subordinated deferrable interest debentures	46,393	46,393
Subordinated debt	63,821	63,775
Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	371,939	330,158
Loans held for investment, net	2,857,552	2,848,536
Loans held for sale (best efforts)	6,172	7,977
Accrued interest receivable	16,605	20,881
Financial liabilities [Abstract]
Deposits	3,638,349	3,625,321
Accrued interest payable	4,229	5,057
Junior subordinated deferrable interest debentures	33,530	33,098
Subordinated debt	57,050	57,497
Level 1 [Member] | Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	371,939	330,158
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	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)	6,172	7,977
Accrued interest receivable	16,605	20,881
Financial liabilities [Abstract]
Deposits	3,638,349	3,625,321
Accrued interest payable	4,229	5,057
Junior subordinated deferrable interest debentures	33,530	33,098
Subordinated debt	57,050	57,497
Level 3 [Member] | Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Loans held for investment, net	2,857,552	2,848,536
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	$ 0	$ 0