LOANS - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
LOANS
Past Due 90+ Days and Accruing	$ 2,308,000	$ 1,207,000
Nonaccrual	22,796,000	9,218,000
Multi-family (5 or more) residential
LOANS
Past Due 90+ Days and Accruing	0	0
Nonaccrual	2,170,000	0
Purchased Credit Impaired
LOANS
Nonaccrual	7,447,000	441,000
Residential mortgage
LOANS
Past Due 90+ Days and Accruing	1,605,000	1,002,000
Nonaccrual	7,031,000	5,078,000
Residential mortgage | Real estate loan | first liens
LOANS
Past Due 90+ Days and Accruing	1,336,000	878,000
Nonaccrual	6,354,000	4,679,000
Residential mortgage | Real estate loan | junior liens
LOANS
Past Due 90+ Days and Accruing	56,000	53,000
Nonaccrual	383,000	326,000
Residential mortgage | Home equity lines of credit
LOANS
Past Due 90+ Days and Accruing	213,000	71,000
Nonaccrual	255,000	73,000
Residential mortgage | Construction Loans
LOANS
Past Due 90+ Days and Accruing	0	0
Nonaccrual	39,000	0
Commercial
LOANS
Past Due 90+ Days and Accruing	681,000	165,000
Nonaccrual	15,673,000	4,124,000
Commercial | Real estate loan
LOANS
Past Due 90+ Days and Accruing	381,000	107,000
Nonaccrual	12,414,000	1,148,000
Commercial | Construction Loans
LOANS
Past Due 90+ Days and Accruing	0	0
Nonaccrual	49,000	1,311,000
Commercial | Commercial and industrial
LOANS
Past Due 90+ Days and Accruing	112,000	15,000
Nonaccrual	955,000	1,051,000
Commercial | Loans secured by farm land
LOANS
Past Due 90+ Days and Accruing	188,000	43,000
Nonaccrual	85,000	565,000
Commercial | Other commercial loans
LOANS
Past Due 90+ Days and Accruing	0	0
Nonaccrual	0	49,000
Consumer
LOANS
Past Due 90+ Days and Accruing	22,000	40,000
Nonaccrual	$ 92,000	$ 16,000