FAIR VALUE MEASUREMENTS - Fair Value By Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Financial Assets
Certificates of deposit at other financial institutions	$ 4,960	$ 10,542
Securities available-for-sale, at fair value	247,832	271,359
Securities held-to-maturity	8,500	7,500
Loans held for sale, at fair value	34,989	125,810
Loans receivable, at fair value	14,863	16,083
Loans receivable, gross	1,971,039	1,754,175	$ 1,672,898
Carrying Amount | Level 1
Financial Assets
Cash and cash equivalents	28,659	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	246,687	270,221
Securities held-to-maturity	8,500	7,500
Loans held for sale, at fair value	34,989	125,810
FHLB stock, at cost	6,295	4,778
Forward TBA mortgage-backed securities	203	53
Loans receivable, at fair value	14,863	16,083
Interest rate swaps	5,601	1,168
Accrued interest receivable	8,553	7,594
Financial Liabilities
Deposits	2,016,100	1,915,744
Borrowings	78,028	42,528
Subordinated notes, excluding unamortized debt issuance costs	50,000	50,000
Accrued interest payable	952	766
Interest rate swaps		155
Carrying Amount | Level 3
Financial Assets
Securities available-for-sale, at fair value	1,145	1,138
Loans receivable, gross	1,931,209	1,738,092
Servicing rights, held at lower of cost or fair value	18,516	16,970
Fair value interest rate locks with customers	184	757
Mandatory and best effort forward commitments with investors	518	808
Fair Value | Level 1
Financial Assets
Cash and cash equivalents	28,659	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	246,687	270,221
Securities held-to-maturity	8,342	8,128
Loans held for sale, at fair value	34,989	125,810
FHLB stock, at cost	6,295	4,778
Forward TBA mortgage-backed securities	203	53
Loans receivable, at fair value	14,863	16,083
Interest rate swaps	5,601	1,168
Accrued interest receivable	8,553	7,594
Financial Liabilities
Deposits	1,999,713	1,912,498
Borrowings	77,630	43,365
Subordinated notes, excluding unamortized debt issuance costs	47,188	51,688
Accrued interest payable	952	766
Interest rate swaps		155
Fair Value | Level 3
Financial Assets
Securities available-for-sale, at fair value	1,145	1,138
Loans receivable, gross	1,895,089	1,725,651
Servicing rights, held at lower of cost or fair value	34,098	26,070
Fair value interest rate locks with customers	184	757
Mandatory and best effort forward commitments with investors	$ 518	$ 808