LOANS, Troubled Debt Restructurings (TDRs) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) Loan	Jun. 30, 2018 USD ($) Loan	Jun. 30, 2019 USD ($) Loan	Jun. 30, 2018 USD ($) Loan	Dec. 31, 2018 USD ($) Loan
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	228		228		218
TDRs, amount	$ 6,081		$ 6,081		$ 5,525
Loans modified in TDR during the year, number | Loan	15	16	32	22
Loans modified in TDR during the year, amount	$ 643	$ 620	$ 1,296	$ 737
Maximum [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
Threshold balance of TDR loans collectively included in general loan loss allocation and qualitative review	$ 500		$ 500
Nonaccrual [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	69		69		62
TDRs, amount	$ 2,841		$ 2,841		$ 2,388
Accruing [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	159		159		156
TDRs, amount	$ 3,240		$ 3,240		$ 3,137
Commercial Portfolio Segment [Member] | Minimum [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
Threshold balance of loans individually evaluated for impairment	$ 500		$ 500
Commercial Portfolio Segment [Member] | Business Lending [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	7		7		6
TDRs, amount	$ 475		$ 475		$ 327
Loans modified in TDR during the year, number | Loan	2	0	2	1
Loans modified in TDR during the year, amount	$ 250	$ 0	$ 250	$ 93
Commercial Portfolio Segment [Member] | Business Lending [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	4		4		4
TDRs, amount	$ 264		$ 264		$ 162
Commercial Portfolio Segment [Member] | Business Lending [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	3		3		2
TDRs, amount	$ 211		$ 211		$ 165
Residential Portfolio Segment [Member] | Consumer Mortgage [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	99		99		92
TDRs, amount	$ 4,187		$ 4,187		$ 3,755
Loans modified in TDR during the year, number | Loan	4	4	11	4
Loans modified in TDR during the year, amount	$ 283	$ 452	$ 861	$ 452
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	51		51		46
TDRs, amount	$ 2,334		$ 2,334		$ 1,986
Residential Portfolio Segment [Member] | Consumer Mortgage [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	48		48		46
TDRs, amount	$ 1,853		$ 1,853		$ 1,769
Consumer Portfolio Segment [Member] | Consumer Indirect [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	75		75		77
TDRs, amount	$ 786		$ 786		$ 857
Loans modified in TDR during the year, number | Loan	4	8	12	11
Loans modified in TDR during the year, amount	$ 33	$ 70	$ 98	$ 92
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	0		0		0
TDRs, amount	$ 0		$ 0		$ 0
Consumer Portfolio Segment [Member] | Consumer Indirect [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	75		75		77
TDRs, amount	$ 786		$ 786		$ 857
Consumer Portfolio Segment [Member] | Consumer Direct [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	22		22		22
TDRs, amount	$ 74		$ 74		$ 71
Loans modified in TDR during the year, number | Loan	2	3	3	5
Loans modified in TDR during the year, amount	$ 6	$ 12	$ 12	$ 14
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	0		0		0
TDRs, amount	$ 0		$ 0		$ 0
Consumer Portfolio Segment [Member] | Consumer Direct [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	22		22		22
TDRs, amount	$ 74		$ 74		$ 71
Consumer Portfolio Segment [Member] | Home Equity [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	25		25		21
TDRs, amount	$ 559		$ 559		$ 515
Loans modified in TDR during the year, number | Loan	3	1	4	1
Loans modified in TDR during the year, amount	$ 71	$ 86	$ 75	$ 86
Consumer Portfolio Segment [Member] | Home Equity [Member] | Nonaccrual [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	14		14		12
TDRs, amount	$ 243		$ 243		$ 240
Consumer Portfolio Segment [Member] | Home Equity [Member] | Accruing [Member]
Troubled Debt Restructurings (TDRs) [Abstract]
TDRs, number | Loan	11		11		9
TDRs, amount	$ 316		$ 316		$ 275