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LOANS - Impaired Loans (Details)	Sep. 30, 2020 USD ($) borrower	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)
LOANS
Unpaid Principal Balance - with no allowance	$ 13,560,000		$ 2,139,000
Recorded Investment - with no allowance	10,527,000		2,111,000
Related Allowance - with no allowance	0		0
Unpaid Principal Balance - with allowance	8,085,000		3,375,000
Recorded investment - with allowance	8,085,000		3,375,000
Related Allowance - with allowance	651,000		1,051,000
Unpaid Principal Balance	21,645,000		5,514,000
Recorded Investment	$ 18,612,000		5,486,000
Residential mortgage
LOANS
Number borrowers collateralized by one property with specific allowance | borrower	2
Residential mortgage | Real estate loan
LOANS
Related Allowance - with allowance	$ 161,000		176,000
Residential mortgage | Real estate loan | first liens
LOANS
Unpaid Principal Balance - with no allowance	1,084,000		645,000
Recorded Investment - with no allowance	1,034,000		617,000
Related Allowance - with no allowance	0		0
Unpaid Principal Balance - with allowance	1,204,000		406,000
Recorded investment - with allowance	1,204,000		406,000
Related Allowance - with allowance	9,000		0
Residential mortgage | Real estate loan | junior liens
LOANS
Unpaid Principal Balance - with no allowance	167,000		42,000
Recorded Investment - with no allowance	112,000		42,000
Related Allowance - with no allowance	0		0
Unpaid Principal Balance - with allowance	312,000		326,000
Recorded investment - with allowance	312,000		326,000
Related Allowance - with allowance	161,000		176,000
Residential mortgage | Home equity lines of credit
LOANS
Unpaid Principal Balance - with no allowance	151,000		0
Recorded Investment - with no allowance	85,000		0
Related Allowance - with no allowance	0		0
Commercial | Real estate loan
LOANS
Unpaid Principal Balance - with no allowance	7,570,000		684,000
Recorded Investment - with no allowance	5,745,000		684,000
Related Allowance - with no allowance	0		0
Unpaid Principal Balance - with allowance	6,497,000		0
Recorded investment - with allowance	6,497,000		0
Related Allowance - with allowance	409,000	$ 1,193,000	0	$ 678,000
Commercial | Commercial and industrial
LOANS
Unpaid Principal Balance - with no allowance	1,732,000		563,000
Recorded Investment - with no allowance	1,295,000		563,000
Related Allowance - with no allowance	0		0
Unpaid Principal Balance - with allowance	72,000		904,000
Recorded investment - with allowance	72,000		904,000
Related Allowance - with allowance	72,000		149,000
Commercial | Loans secured by farm land
LOANS
Unpaid Principal Balance - with no allowance	85,000		129,000
Recorded Investment - with no allowance	85,000		129,000
Related Allowance - with no allowance	0		0
Unpaid Principal Balance - with allowance	0		478,000
Recorded investment - with allowance	0		478,000
Related Allowance - with allowance	0		48,000
Commercial | Multi-family (5 or more) residential
LOANS
Unpaid Principal Balance - with no allowance	2,771,000		0
Recorded Investment - with no allowance	2,171,000		0
Related Allowance - with no allowance	0		0
Commercial | Agricultural loans
LOANS
Unpaid Principal Balance - with no allowance	0		76,000
Recorded Investment - with no allowance	0		76,000
Related Allowance - with no allowance	0		0
Commercial | Construction Loans
LOANS
Unpaid Principal Balance - with allowance	0		1,261,000
Recorded investment - with allowance	0		1,261,000
Related Allowance - with allowance	$ 0		$ 678,000

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