REGULATORY MATTERS - Comparison of the Company's and Bank's Actual Capital Amounts and Ratios to Required Capital Amounts and Ratios (Details) $ in Thousands	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Total capital to risk-weighted assets:
Actual, Amount	$ 289,390	$ 263,144
Actual, Ratio	14.13	13.20
Minimum Required for Capital Adequacy Purposes, Amount	$ 163,886	$ 159,496
Minimum Required for Capital Adequacy Purposes, Ratio	8.00	8.00
Minimum Required Under Basel III (Including Buffer), Amount	$ 215,100	$ 209,338
Minimum Required Under Basel III (Including Buffer), Ratio	10.50	10.50
Tier 1 capital to risk-weighted assets:
Actual, Amount	$ 263,721	$ 238,115
Actual, Ratio	12.87	11.94
Minimum Required for Capital Adequacy Purposes, Amount	$ 122,914	$ 119,622
Minimum Required for Capital Adequacy Purposes, Ratio	6.00	6.00
Minimum Required Under Basel III (Including Buffer), Amount	$ 174,129	$ 169,464
Minimum Required Under Basel III (Including Buffer), Ratio	8.50	8.50
Tier 1 capital to average assets:
Actual, Amount	$ 263,721	$ 238,115
Actual, Ratio	9.06	9.13
Minimum Required for Capital Adequacy Purposes, Amount	$ 116,422	$ 104,293
Minimum Required for Capital Adequacy Purposes, Ratio	4.00	4.00
Minimum Required Under Basel III (Including Buffer), Amount	$ 116,422	$ 104,293
Minimum Required Under Basel III (Including Buffer), Ratio	4.00	4.00
Common equity tier 1 capital to risk-weighted assets:
Actual, Amount	$ 253,411	$ 227,805
Actual, Ratio	12.37	11.43
Minimum Required for Capital Adequacy Purposes, Amount	$ 92,186	$ 89,716
Minimum Required for Capital Adequacy Purposes, Ratio	4.50%	4.50%
Minimum Required Under Basel III (Including Buffer), Amount	$ 143,400	$ 139,559
Minimum Required Under Basel III (Including Buffer), Ratio	7.00%	7.00%
Bank
Total capital to risk-weighted assets:
Actual, Amount	$ 301,528	$ 285,490
Actual, Ratio	14.71	14.32
Minimum Required for Capital Adequacy Purposes, Amount	$ 164,015	$ 159,514
Minimum Required for Capital Adequacy Purposes, Ratio	8.00	8.00
Minimum Required Under Basel III (Including Buffer), Amount	$ 215,270	$ 209,362
Minimum Required Under Basel III (Including Buffer), Ratio	10.50	10.50
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 205,019	$ 199,392
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00	10.00
Tier 1 capital to risk-weighted assets:
Actual, Amount	$ 275,839	$ 260,459
Actual, Ratio	13.45	13.06
Minimum Required for Capital Adequacy Purposes, Amount	$ 123,011	$ 119,635
Minimum Required for Capital Adequacy Purposes, Ratio	6.00	6.00
Minimum Required Under Basel III (Including Buffer), Amount	$ 174,266	$ 169,483
Minimum Required Under Basel III (Including Buffer), Ratio	8.50	8.50
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 164,015	$ 159,514
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00	8.00
Tier 1 capital to average assets:
Actual, Amount	$ 275,839	$ 260,459
Actual, Ratio	9.48	9.99
Minimum Required for Capital Adequacy Purposes, Amount	$ 116,418	$ 104,293
Minimum Required for Capital Adequacy Purposes, Ratio	4.00	4.00
Minimum Required Under Basel III (Including Buffer), Amount	$ 116,418	$ 104,293
Minimum Required Under Basel III (Including Buffer), Ratio	4.00	4.00
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 145,523	$ 130,366
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00	5.00
Common equity tier 1 capital to risk-weighted assets:
Actual, Amount	$ 275,839	$ 260,459
Actual, Ratio	13.45	13.06
Minimum Required for Capital Adequacy Purposes, Amount	$ 92,259	$ 89,726
Minimum Required for Capital Adequacy Purposes, Ratio	4.50%	4.50%
Minimum Required Under Basel III (Including Buffer), Amount	$ 143,513	$ 139,574
Minimum Required Under Basel III (Including Buffer), Ratio	7.00%	7.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 133,262	$ 129,605
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%