REGULATORY MATTERS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Incremental capital conservation buffer	0.625%
Capital conversation buffer	2.50%
Total capital (to risk weighted assets)
Actual - Amount	$ 455,754,000	$ 413,666,000
Actual - Ratio	12.70%	11.80%
For Capital Adequacy Purposes - Amount	$ 287,840,000	$ 280,104,000
For Capital Adequacy Purposes - Ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets)
Actual - Amount	$ 390,690,000	$ 352,371,000
Actual - Ratio	10.90%	10.10%
For Capital Adequacy Purposes - Amount	$ 215,880,000	$ 210,078,000
For Capital Adequacy Purposes - Ratio	6.00%	6.00%
Common equity tier 1 capital
Actual - Amount	$ 377,328,000	$ 339,430,000
Actual - Ratio	10.50%	9.70%
Common Equity Tier One Capital Required For Capital Adequacy	$ 161,910,000	$ 157,559,000
For Capital Adequacy Purposes - Ratio	0.045	0.045
Tier I capital (to average assets)
Actual - Amount	$ 390,690,000	$ 352,371,000
Actual - Ratio	9.50%	9.10%
For Capital Adequacy Purposes - Amount	$ 164,632,000	$ 155,271,000
For Capital Adequacy Purposes - Ratio	4.00%	4.00%
Dividends paid	$ 1,000,000	$ 0
The Bank
Total capital (to risk weighted assets)
Actual - Amount	$ 444,198,000	$ 371,833,000
Actual - Ratio	12.40%	10.80%
For Capital Adequacy Purposes - Amount	$ 286,648,000	$ 276,144,000
For Capital Adequacy Purposes - Ratio	8.00%	8.00%
To be Categorized as Well Capitalized under Prompt Corrective Action Provisions - Amount	$ 358,310,000	$ 345,180,000
To be Categorized as Well Capitalized under Prompt Corrective Action Provisions - Ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets)
Actual - Amount	$ 415,542,000	$ 344,423,000
Actual - Ratio	11.60%	10.00%
For Capital Adequacy Purposes - Amount	$ 214,986,000	$ 207,108,000
For Capital Adequacy Purposes - Ratio	6.00%	6.00%
To be Categorized as Well Capitalized under Prompt Corrective Action Provisions - Amount	$ 286,648,000	$ 276,144,000
To be Categorized as Well Capitalized under Prompt Corrective Action Provisions - Ratio	8.00%	8.00%
Common equity tier 1 capital
Actual - Amount	$ 415,542,000	$ 344,423,000
Actual - Ratio	11.60%	10.00%
Common Equity Tier One Capital Required For Capital Adequacy	$ 161,239,000	$ 155,331,000
For Capital Adequacy Purposes - Ratio	0.045	0.045
To be Categorized as Well Capitalized under Prompt Corrective Action Provisions - Amount	$ 232,901,000	$ 224,367,000
Common Equity Tier One Capital Required To Be Well Capitalized Ratio	6.50%	6.50%
Tier I capital (to average assets)
Actual - Amount	$ 415,542,000	$ 344,423,000
Actual - Ratio	10.10%	9.00%
For Capital Adequacy Purposes - Amount	$ 164,390,000	$ 154,946,000
For Capital Adequacy Purposes - Ratio	4.00%	4.00%
To be Categorized as Well Capitalized under Prompt Corrective Action Provisions - Amount	$ 205,487,000	$ 193,682,000
To be Categorized as Well Capitalized under Prompt Corrective Action Provisions - Ratio	5.00%	5.00%