FAIR VALUES - Quantitative Information (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Recurring | Derivative liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Liabilities, fair value, recurring	$ 365	$ 140
Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring	1,554	1,456
Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring	$ 517	$ 574
Residential Mortgage | Minimum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	20.80%
Residential Mortgage | Maximum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	35.29%	39.78%
Residential Mortgage | Weighted Average | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	24.09%	22.94%
Sales Comparison | Commercial mortgages | Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring	$ 1,554	$ 1,456
Sales Comparison | Commercial mortgages | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring	$ 111	$ 213
Sales Comparison | Commercial mortgages | Minimum | Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	10.00%	11.76%
Sales Comparison | Commercial mortgages | Minimum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	10.00%
Sales Comparison | Commercial mortgages | Maximum | Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	10.00%	11.76%
Sales Comparison | Commercial mortgages | Maximum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	24.80%
Sales Comparison | Commercial mortgages | Weighted Average | Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	10.00%	11.76%
Sales Comparison | Commercial mortgages | Weighted Average | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	17.72%
Sales Comparison | Residential Mortgage | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring	$ 284	$ 204
Sales Comparison | Home equity lines and loans | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring	$ 122	$ 157
Sales Comparison | Home equity lines and loans | Minimum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	20.80%
Sales Comparison | Home equity lines and loans | Maximum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	20.80%
Sales Comparison | Home equity lines and loans | Weighted Average | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	20.80%
Measurement Input, Discount Rate | Minimum | Recurring | Derivative liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount rate	0.0730	0.0746
Measurement Input, Discount Rate | Maximum | Recurring | Derivative liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount rate	0.0730	0.0746
Measurement Input, Discount Rate | Weighted Average | Recurring | Derivative liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount rate	0.0730	0.0746