FAIR VALUE DISCLOSURES - Estimated Fair Values, and Related Carrying Amounts of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	$ 787,757	$ 552,439
Loans held for investment, net	3,718,358	3,099,371
Loans held for sale (best efforts)	3,679	2,197
Accrued interest receivable	20,306	20,931
Financial liabilities:
Deposits	4,640,626	3,874,077
Accrued interest payable	5,716	5,014
Junior subordinated deferrable interest debentures	46,393	46,393
Subordinated debt	14,100	14,100
Fair Value [Member]
Financial assets:
Cash and cash equivalents	787,757	552,439
Loans held for investment, net	3,708,299	3,082,072
Loans held for sale (best efforts)	3,733	2,237
Accrued interest receivable	20,306	20,931
Financial liabilities:
Deposits	4,640,512	3,873,806
Accrued interest payable	5,716	5,014
Junior subordinated deferrable interest debentures	35,844	35,213
Subordinated debt	13,260	13,907
Fair Value [Member] | Level 1 [Member]
Financial assets:
Cash and cash equivalents	787,757	552,439
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
Junior subordinated deferrable interest debentures	0	0
Subordinated debt	0	0
Fair Value [Member] | Level 2 [Member]
Financial assets:
Cash and cash equivalents	0	0
Loans held for investment, net	0	0
Loans held for sale (best efforts)	3,733	2,237
Accrued interest receivable	20,306	20,931
Financial liabilities:
Deposits	4,640,512	3,873,806
Accrued interest payable	5,716	5,014
Junior subordinated deferrable interest debentures	35,844	35,213
Subordinated debt	13,260	13,907
Fair Value [Member] | Level 3 [Member]
Financial assets:
Cash and cash equivalents	0	0
Loans held for investment, net	3,708,299	3,082,072
Loans held for sale (best efforts)	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
Junior subordinated deferrable interest debentures	0	0
Subordinated debt	$ 0	$ 0