FAIR VALUE - ASSETS MEASURED ON NON-RECURRING BASIS (Details) - Nonrecurring basis - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value Disclosures
Impaired loan on non-recurring basis	$ 8,063	$ 8,920
Mortgage servicing rights	328
Residential Real Estate - Owner Occupied
Fair Value Disclosures
Impaired loan on non-recurring basis	3,794	3,598
Residential Real Estate - Non Owner Occupied
Fair Value Disclosures
Impaired loan on non-recurring basis		14
Commercial Real Estate
Fair Value Disclosures
Impaired loan on non-recurring basis	2,602	3,276
Commercial & industrial
Fair Value Disclosures
Impaired loan on non-recurring basis	1,336	1,562
Home equity lines of credit
Fair Value Disclosures
Impaired loan on non-recurring basis	331	470
Fair Value, Inputs, Level 2
Fair Value Disclosures
Mortgage servicing rights	328
Fair Value, Inputs, Level 3
Fair Value Disclosures
Impaired loan on non-recurring basis	8,063	8,920
Fair Value, Inputs, Level 3 | Residential Real Estate - Owner Occupied
Fair Value Disclosures
Impaired loan on non-recurring basis	3,794	3,598
Fair Value, Inputs, Level 3 | Residential Real Estate - Non Owner Occupied
Fair Value Disclosures
Impaired loan on non-recurring basis		14
Fair Value, Inputs, Level 3 | Commercial Real Estate
Fair Value Disclosures
Impaired loan on non-recurring basis	2,602	3,276
Fair Value, Inputs, Level 3 | Commercial & industrial
Fair Value Disclosures
Impaired loan on non-recurring basis	1,336	1,562
Fair Value, Inputs, Level 3 | Home equity lines of credit
Fair Value Disclosures
Impaired loan on non-recurring basis	$ 331	$ 470