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LOANS, Troubled Debt Restructurings (TDRs) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan	Dec. 31, 2019 USD ($) loan
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	248		248		248
TDRs, amount	$ 7,183		$ 7,183		$ 6,982
Loans modified in TDR during the year, number | loan	25	21	46	53
Loans modified in TDR during the year, amount	$ 835	$ 1,020	$ 1,707	$ 2,244
Maximum [Member]
Troubled Debt Restructurings (TDRs)
Threshold balance of TDR loans collectively included in general loan loss allocation and qualitative review	$ 500		$ 500
Nonaccrual [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	76		76		80
TDRs, amount	$ 3,357		$ 3,357		$ 3,609
Accruing [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	172		172		168
TDRs, amount	$ 3,826		$ 3,826		$ 3,373
Commercial Portfolio Segment [Member] | Minimum [Member]
Troubled Debt Restructurings (TDRs)
Threshold balance of loans individually evaluated for impairment	$ 500		$ 500
Commercial Portfolio Segment [Member] | Business Lending [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	11		11		11
TDRs, amount	$ 797		$ 797		$ 882
Loans modified in TDR during the year, number | loan	0	1	0	3
Loans modified in TDR during the year, amount	$ 0	$ 415	$ 0	$ 660
Commercial Portfolio Segment [Member] | Business Lending [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	8		8		8
TDRs, amount	$ 602		$ 602		$ 681
Commercial Portfolio Segment [Member] | Business Lending [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	3		3		3
TDRs, amount	$ 195		$ 195		$ 201
Residential Portfolio Segment [Member] | Consumer Mortgage [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	104		104		106
TDRs, amount	$ 4,808		$ 4,808		$ 4,530
Loans modified in TDR during the year, number | loan	8	8	17	19
Loans modified in TDR during the year, amount	$ 646	$ 464	$ 1,378	$ 1,271
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	57		57		59
TDRs, amount	$ 2,478		$ 2,478		$ 2,638
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	47		47		47
TDRs, amount	$ 2,330		$ 2,330		$ 1,892
Consumer Portfolio Segment [Member] | Consumer Indirect [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	85		85		84
TDRs, amount	$ 935		$ 935		$ 941
Loans modified in TDR during the year, number | loan	14	10	25	22
Loans modified in TDR during the year, amount	$ 131	$ 116	$ 261	$ 206
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	0		0		0
TDRs, amount	$ 0		$ 0		$ 0
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	85		85		84
TDRs, amount	$ 935		$ 935		$ 941
Consumer Portfolio Segment [Member] | Consumer Direct [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	24		24		23
TDRs, amount	$ 94		$ 94		$ 101
Loans modified in TDR during the year, number | loan	1	2	2	5
Loans modified in TDR during the year, amount	$ 2	$ 25	$ 12	$ 35
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	0		0		0
TDRs, amount	$ 0		$ 0		$ 0
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	24		24		23
TDRs, amount	$ 94		$ 94		$ 101
Consumer Portfolio Segment [Member] | Home Equity [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	24		24		24
TDRs, amount	$ 549		$ 549		$ 528
Loans modified in TDR during the year, number | loan	2	0	2	4
Loans modified in TDR during the year, amount	$ 56	$ 0	$ 56	$ 72
Consumer Portfolio Segment [Member] | Home Equity [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	11		11		13
TDRs, amount	$ 277		$ 277		$ 290
Consumer Portfolio Segment [Member] | Home Equity [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs)
TDRs, number | loan	13		13		11
TDRs, amount	$ 272		$ 272		$ 238

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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