FAIR VALUE DISCLOSURES - Estimated Fair Values, and Related Carrying Amounts (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	$ 635,046	$ 359,082
Loans held for investment, net	3,009,378	3,011,817
Loans held for sale (best efforts)	3,134	6,751
Accrued interest receivable	18,012	21,687
Financial liabilities:
Deposits	3,881,143	3,620,876
Accrued interest payable	4,671	6,108
Short-term borrowings	0
Junior subordinated deferrable interest debentures	46,393	46,393
Subordinated debt	14,100	63,961
Fair Value [Member]
Financial assets:
Cash and cash equivalents	635,046	359,082
Loans held for investment, net	2,982,640	2,937,678
Loans held for sale (best efforts)	3,193	6,875
Accrued interest receivable	18,012	21,687
Financial liabilities:
Deposits	3,880,874	3,621,106
Accrued interest payable	4,671	6,108
Short-term borrowings	0
Junior subordinated deferrable interest debentures	34,827	34,285
Subordinated debt	14,012	60,969
Level 1 [Member] | Fair Value [Member]
Financial assets:
Cash and cash equivalents	635,046	359,082
Loans held for investment, net	0	0
Loans held for sale (best efforts)	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
Short-term borrowings	0
Junior subordinated deferrable interest debentures	0	0
Subordinated debt	0	0
Level 2 [Member] | Fair Value [Member]
Financial assets:
Cash and cash equivalents	0	0
Loans held for investment, net	0	0
Loans held for sale (best efforts)	3,193	6,875
Accrued interest receivable	18,012	21,687
Financial liabilities:
Deposits	3,880,874	3,621,106
Accrued interest payable	4,671	6,108
Short-term borrowings	0
Junior subordinated deferrable interest debentures	34,827	34,285
Subordinated debt	14,012	60,969
Level 3 [Member] | Fair Value [Member]
Financial assets:
Cash and cash equivalents	0	0
Loans held for investment, net	2,982,640	2,937,678
Loans held for sale (best efforts)	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
Short-term borrowings	0
Junior subordinated deferrable interest debentures	0	0
Subordinated debt	$ 0	$ 0