REGULATORY MATTERS - Comparison of the Company's and Bank's Actual Capital Amounts and Ratios to Required Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Total capital to risk-weighted assets:
Actual, Amount	$ 213,905	$ 149,468
Actual, Ratio	14.62%	10.86%
Minimum Required for Capital Adequacy Purposes, Amount	$ 117,065	$ 110,083
Minimum Required for Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 capital to risk-weighted assets:
Actual, Amount	$ 201,377	$ 137,984
Actual, Ratio	13.76%	10.03%
Minimum Required for Capital Adequacy Purposes, Amount	$ 87,799	$ 82,562
Minimum Required for Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier 1 capital to average assets:
Actual, Amount	$ 201,377	$ 137,984
Actual, Ratio	10.68%	7.71%
Minimum Required for Capital Adequacy Purposes, Amount	$ 75,457	$ 71,560
Minimum Required for Capital Adequacy Purposes, Ratio	4.00%	4.00%
Common equity tier 1 capital to risk-weighted assets:
Actual, Amount	$ 191,067	$ 127,674
Actual, Ratio	13.06%	9.28%
Minimum Required for Capital Adequacy Purposes, Amount	$ 65,849	$ 61,922
Minimum Required for Capital Adequacy Purposes, Ratio	4.50%	4.50%
Subordinated Debentures | Subordinated Debentures II, Subordinated Debentures III, and DCB Debentures I
Common equity tier 1 capital to risk-weighted assets:
Debenture issued	$ 10,310	$ 10,310
Bank
Total capital to risk-weighted assets:
Actual, Amount	$ 202,722	$ 173,528
Actual, Ratio	13.85%	12.63%
Minimum Required for Capital Adequacy Purposes, Amount	$ 117,078	$ 109,947
Minimum Required for Capital Adequacy Purposes, Ratio	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 146,348	$ 137,434
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 capital to risk-weighted assets:
Actual, Amount	$ 190,194	$ 162,044
Actual, Ratio	13.00%	11.79%
Minimum Required for Capital Adequacy Purposes, Amount	$ 87,809	$ 82,460
Minimum Required for Capital Adequacy Purposes, Ratio	6.00%	6.00%
To Be Well Capitalized Under Prompt Correct Action Provisions, Amount	$ 117,078	$ 109,947
To Be Well Capitalized Under Prompt Correct Action Provisions, Ratio	8.00%	8.00%
Tier 1 capital to average assets:
Actual, Amount	$ 190,194	$ 162,044
Actual, Ratio	10.08%	9.06%
Minimum Required for Capital Adequacy Purposes, Amount	$ 75,465	$ 71,505
Minimum Required for Capital Adequacy Purposes, Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 94,331	$ 89,381
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	$ 190,195	$ 162,044
Actual, Ratio	13.11%	11.79%
Minimum Required for Capital Adequacy Purposes, Amount	$ 65,307	$ 61,845
Minimum Required for Capital Adequacy Purposes, Ratio	4.50%	4.50%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 94,333	$ 89,332
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%