Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) (Changes in the Components of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]
Beginning balance	$ 177,484	$ 135,075	$ 170,578	$ 127,085
Other comprehensive income before reclassifications	382	190	1,638	2,111
Total other comprehensive income	361	150	1,544	2,012
Ending balance	182,007	138,527	182,007	138,527
Unrealized Holding Gains (Losses) on Available for Sale Securities
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]
Beginning balance	1,452	162	303	(1,679)
Other comprehensive income before reclassifications	332	152	1,489	1,993
Amounts reclassified from accumulated other comprehensive income	10	(12)	2	(12)
Total other comprehensive income	342	140	1,491	1,981
Ending balance	1,794	302	1,794	302
Unrealized Impairment Loss on Held to Maturity Security
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]
Beginning balance	(369)	(379)	(374)	(382)
Other comprehensive income before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	5	2	10	5
Total other comprehensive income	5	2	10	5
Ending balance	(364)	(377)	(364)	(377)
Unfunded Pension Liability
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]
Beginning balance	291	246	262	228
Other comprehensive income before reclassifications	50	38	149	118
Amounts reclassified from accumulated other comprehensive income	(36)	(30)	(106)	(92)
Total other comprehensive income	14	8	43	26
Ending balance	305	254	305	254
Unrealized Impairment Loss on Held to Maturity Security and Unfunded Pension Liability
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	(31)	(28)	(96)	(87)
Accumulated Other Comprehensive Income (Loss)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]
Beginning balance	1,374	29	191	(1,833)
Total other comprehensive income	361	150	1,544	2,012
Ending balance	$ 1,735	$ 179	$ 1,735	$ 179