FAIR VALUE - Carrying amounts and Estimated fair values (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financial Assets:
SBA servicing assets	$ 7,900	$ 13,100
Recurring
Financial Assets:
SBA servicing assets	10,091	9,488
Interest only strips	143	155
Interest rate derivatives	367
Recurring | Carrying Amount
Financial Assets:
Cash, due from banks, and federal funds sold	441,341	150,688
Investment securities	37,119	18,117
FHLB stock	19,701	6,147
Loans, net	2,488,118	1,620,209
Accrued interest receivable	11,052	10,671
SBA servicing assets	10,091	9,488
Mortgage servicing assets	7,747	12,991
Interest only strips	143	155
Interest rate derivatives	367
Financial Liabilities:
Deposits	2,263,020	1,479,889
Federal Home Loan Bank advances	500,000	110,000
Other borrowings	459	483
Accrued interest payable	204	222
Interest rate swaps	46
Recurring | Estimated Fair Value
Financial Assets:
Cash, due from banks, and federal funds sold	441,341	150,688
Investment securities	37,119	18,117
Loans, net	2,561,269	1,665,413
Accrued interest receivable	11,052	10,671
SBA servicing assets	10,091	9,488
Mortgage servicing assets	7,937	13,069
Interest only strips	143	155
Interest rate derivatives	367
Financial Liabilities:
Deposits	2,263,246	1,480,777
Federal Home Loan Bank advances	501,450	110,000
Other borrowings	459	483
Accrued interest payable	204	222
Interest rate swaps	46
Level 1 | Recurring | Estimated Fair Value
Financial Assets:
Investment securities	11,386
Level 2 | Recurring
Financial Assets:
Interest rate derivatives	367
Level 2 | Recurring | Estimated Fair Value
Financial Assets:
Cash, due from banks, and federal funds sold	441,341	150,688
Investment securities	18,784	8,811
Accrued interest receivable	100
Interest rate derivatives	367
Financial Liabilities:
Deposits	2,263,246	1,480,777
Federal Home Loan Bank advances	501,450	110,000
Other borrowings	459	483
Accrued interest payable	204	222
Interest rate swaps	46
Level 3 | Recurring
Financial Assets:
SBA servicing assets	10,091	9,488
Interest only strips	143	155
Level 3 | Recurring | Estimated Fair Value
Financial Assets:
Investment securities	6,949	9,306
Loans, net	2,561,269	1,665,413
Accrued interest receivable	10,952	10,671
SBA servicing assets	10,091	9,488
Mortgage servicing assets	7,937	13,069
Interest only strips	$ 143	$ 155