Accumulated Other Comprehensive Gain (loss) - Schedule of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 156,588	$ 147,036	$ 154,982	$ 143,544
Other comprehensive gain before reclassifications	1,355	2,221	1,903	3,788
Amounts reclassified from accumulated other comprehensive (loss) gain	(107)	38	(91)	65
Total other comprehensive income	1,248	2,259	1,812	3,853
Ending balance	159,608	151,541	159,608	151,541
Net Unrealized Gain (Loss) on Available for Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	2,986	197	2,455	(1,360)
Other comprehensive gain before reclassifications	1,355	2,221	1,903	3,788
Amounts reclassified from accumulated other comprehensive (loss) gain	(147)	1	(164)	(9)
Total other comprehensive income	1,208	2,222	1,739	3,779
Ending balance	4,194	2,419	4,194	2,419
Defined Benefit Plan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(5,199)	(5,239)	(5,232)	(5,276)
Other comprehensive gain before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive (loss) gain	40	37	73	74
Total other comprehensive income	40	37	73	74
Ending balance	(5,159)	(5,202)	(5,159)	(5,202)
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2,213)	(5,042)	(2,777)	(6,636)
Total other comprehensive income	1,248	2,259	1,812	3,853
Ending balance	$ (965)	$ (2,783)	$ (965)	$ (2,783)