FAIR VALUE DISCLOSURES, Estimated Fair Values, and Related Carrying Amounts (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Carrying Amount [Member]
Financial assets [Abstract]
Cash and cash equivalents	$ 528,612	$ 486,821
Loans held for investment, net	2,413,982	2,395,479
Loans held for sale (best efforts)	7,276	28,914
Accrued interest receivable	10,512	13,900
Financial liabilities [Abstract]
Deposits	3,450,157	3,341,222
Short-term borrowings		26,550
Accrued interest payable	952	1,914
Junior subordinated deferrable interest debentures	46,393	46,393
Subordinated debt securities	75,821	75,775
Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	528,612	486,821
Loans held for investment, net	2,413,792	2,397,079
Loans held for sale (best efforts)	7,454	29,500
Accrued interest receivable	10,512	13,900
Financial liabilities [Abstract]
Deposits	3,450,510	3,343,888
Short-term borrowings		26,550
Accrued interest payable	952	1,914
Junior subordinated deferrable interest debentures	33,850	45,690
Subordinated debt securities	79,562	77,939
Level 1 [Member] | Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	528,612	486,821
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	3,004,091
Short-term borrowings		26,550
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)	7,454	29,500
Accrued interest receivable	10,512	13,900
Financial liabilities [Abstract]
Deposits	3,450,510	339,797
Short-term borrowings		0
Accrued interest payable	952	1,914
Junior subordinated deferrable interest debentures	33,850	45,690
Subordinated debt securities	79,562	77,939
Level 3 [Member] | Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Loans held for investment, net	2,413,792	2,397,079
Loans held for sale (best efforts)	0	0
Accrued interest receivable	0	0
Financial liabilities [Abstract]
Deposits	0	0
Short-term borrowings		0
Accrued interest payable	0	0
Junior subordinated deferrable interest debentures	0	0
Subordinated debt securities	$ 0	$ 0