FAIR VALUE MEASUREMENTS - Fair Value By Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Financial Assets
Certificates of deposit at other financial institutions	$ 4,960	$ 10,542
Securities available-for-sale, at fair value	227,942	271,359
Securities held-to-maturity	8,500	7,500
Loans held for sale, at fair value	23,447	125,810
Loans receivable, at fair value	14,198	16,083
Loans receivable, gross	2,110,355	1,754,175	$ 1,704,968
Carrying Amount | Level 1
Financial Assets
Cash and cash equivalents	159,797	26,491
Certificates of deposit at other financial institutions	4,960	10,542
Carrying Amount | Level 2
Financial Assets
Securities available-for-sale, at fair value	227,942	271,359
Securities held-to-maturity	8,500	7,500
Loans held for sale, at fair value	23,447	125,810
FHLB stock, at cost	13,591	4,778
Forward TBA mortgage-backed securities	1,154	53
Loans receivable, at fair value	14,198	16,083
Interest rate swaps	10,418	1,168
Accrued interest receivable	10,407	7,594
Financial Liabilities
Deposits	2,083,338	1,915,744
Borrowings	260,828	42,528
Subordinated notes, excluding unamortized debt issuance costs	50,000	50,000
Accrued interest payable	1,200	766
Interest rate swaps		155
Carrying Amount | Level 3
Financial Assets
Loans receivable, gross	2,096,157	1,738,092
Servicing rights, held at lower of cost or fair value	18,470	16,970
Fair value interest rate locks with customers		757
Mandatory and best effort forward commitments with investors	294	808
Financial Liabilities
Fair value interest rate locks with customers	172
Fair Value | Level 1
Financial Assets
Cash and cash equivalents	159,797	26,491
Certificates of deposit at other financial institutions	4,960	10,542
Fair Value | Level 2
Financial Assets
Securities available-for-sale, at fair value	227,942	271,359
Securities held-to-maturity	7,950	8,128
Loans held for sale, at fair value	23,447	125,810
FHLB stock, at cost	13,591	4,778
Forward TBA mortgage-backed securities	1,154	53
Loans receivable, at fair value	14,198	16,083
Interest rate swaps	10,418	1,168
Accrued interest receivable	10,407	7,594
Financial Liabilities
Deposits	2,060,539	1,912,498
Borrowings	260,058	43,365
Subordinated notes, excluding unamortized debt issuance costs	44,500	51,688
Accrued interest payable	1,200	766
Interest rate swaps		155
Fair Value | Level 3
Financial Assets
Loans receivable, gross	2,030,648	1,725,651
Servicing rights, held at lower of cost or fair value	36,457	26,070
Fair value interest rate locks with customers		757
Mandatory and best effort forward commitments with investors	294	$ 808
Financial Liabilities
Fair value interest rate locks with customers	$ 172