OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of accumulated other comprehensive loss, net of tax [Abstract]
Net unrealized gain on securities available for sale		$ 7,668	$ 2,899
Tax effect		(1,610)	(609)
Net -of-tax amount		6,058	2,290
Unrealized loss on interest rate swap [Abstract]
Unrealized loss on interest rate swap		(11)	0
Tax effect		2	0
Net -of-tax amount		(9)	0
Unrecognized pension costs [Abstract]
Unrecognized pension costs		(4,383)	(3,695)
Tax effect		921	776
Net -of-tax amount		(3,462)	(2,919)
Total accumulated other comprehensive income (loss)		2,587	(629)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance		154,774	139,229	$ 129,011
Other comprehensive income (loss) before reclassifications (net of tax)		3,272	3,097	(686)
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)		(56)	195	162
Other comprehensive income (loss)		3,216	3,292	(524)
Balance		194,259	154,774	139,229
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance		(629)	(3,921)	(3,398)
Other comprehensive income (loss)		3,216	3,292	(524)
Balance		2,587	(629)	(3,921)
Unrealized Gain (Loss) on Available For Sale Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	[1]	2,290	(973)	(269)
Other comprehensive income (loss) before reclassifications (net of tax)	[1]	4,008	3,283	(720)
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)	[1]	(240)	(20)	15
Other comprehensive income (loss)	[1]	3,768	3,263	(705)
Balance	[1]	6,058	2,290	(973)
Unrealized Gain (Loss) on Interest Rate Swap [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	[1]	0	0	0
Other comprehensive income (loss) before reclassifications (net of tax)	[1]	(9)	0	0
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)	[1]	0	0	0
Other comprehensive income (loss)	[1]	(9)	0	0
Balance	[1]	(9)	0	0
Defined Benefit Pension Items [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	[1]	(2,919)	(2,948)	(3,129)
Other comprehensive income (loss) before reclassifications (net of tax)	[1]	(727)	(186)	34
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)	[1]	184	215	147
Other comprehensive income (loss)	[1]	(543)	29	181
Balance	[1]	$ (3,462)	$ (2,919)	(2,948)
Cumulative Effect, Period of Adoption, Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance				0
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance				1
Cumulative Effect, Period of Adoption, Adjustment [Member] | Unrealized Gain (Loss) on Available For Sale Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	[1]			$ 1

[1] Amounts in parentheses indicate debits