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REGULATORY MATTERS - Minimum regulatory capital requirements (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital, Actual Amount $ 177,223 $ 162,507
Capital to Risk Weighted Assets, Actual Ratio 15.69% 15.45%
Capital Required for Capital Adequacy, Amount $ 90,366 $ 84,124
Capital Required for Capital Adequacy to Risk Weighted Assets, Ratio 8.00% 8.00%
Capital Required to be Well Capitalized $ 112,958 $ 105,156
Capital Required to be Well Capitalized to Risk Weighted Assets 10.00% 10.00%
Tier One Risk Based Capital, Actual Amount $ 168,899 $ 153,838
Tier One Risk Based Capital to Risk Weighted Assets, Actual Ratio 14.95% 14.63%
Tier One Risk Based Capital Required for Capital Adequacy, Amount $ 67,775 $ 63,093
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets, Ratio 6.00% 6.00%
Tier One Risk Based Capital Required to be Well Capitalized $ 90,366 $ 84,124
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 8.00% 8.00%
Common Equity Tier One Risk Based Capital, Amount $ 168,899 $ 153,838
Common Equity Tier One Risk Based Capital to Risk Weighted Assets, Ratio 14.95% 14.63%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy, Amount $ 50,831 $ 47,320
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets, Ratio 4.50% 4.50%
Common Equity Tier One Risk Based Capital Required to be Well Capitalized, Amount $ 73,422 $ 68,351
Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets, Ratio 6.50% 6.50%
Tier One Leverage Capital, Actual Amount $ 168,899 $ 153,838
Tier One Leverage Capital to Average Assets, Actual Ratio 13.59% 12.42%
Tier One Leverage Capital Required for Capital Adequacy, Amount $ 49,730 $ 49,557
Tier One Leverage Capital Required for Capital Adequacy to Average Assets, Ratio 4.00% 4.00%
Tier One Leverage Capital Required to be Well Capitalized $ 62,162 $ 61,947
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00% 5.00%
Subsidiaries [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital, Actual Amount $ 205,462 $ 202,675
Capital to Risk Weighted Assets, Actual Ratio 18.26% 19.26%
Capital Required for Capital Adequacy, Amount $ 90,003 $ 84,179
Capital Required for Capital Adequacy to Risk Weighted Assets, Ratio 8.00% 8.00%
Tier One Risk Based Capital, Actual Amount $ 197,138 $ 194,006
Tier One Risk Based Capital to Risk Weighted Assets, Actual Ratio 17.52% 18.44%
Tier One Risk Based Capital Required for Capital Adequacy, Amount $ 67,502 $ 63,135
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets, Ratio 6.00% 6.00%
Common Equity Tier One Risk Based Capital, Amount $ 185,138 $ 182,006
Common Equity Tier One Risk Based Capital to Risk Weighted Assets, Ratio 16.46% 17.30%
Common Equity Tier One Risk Based Capital Required for Capital Adequacy, Amount $ 50,627 $ 47,351
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets, Ratio 4.50% 4.50%
Tier One Leverage Capital, Actual Amount $ 197,138 $ 194,006
Tier One Leverage Capital to Average Assets, Actual Ratio 15.84% 15.65%
Tier One Leverage Capital Required for Capital Adequacy, Amount $ 49,777 $ 49,576
Tier One Leverage Capital Required for Capital Adequacy to Average Assets, Ratio 4.00% 4.00%