Accumulated Other Comprehensive Income (Accumulated Other Comprehensive Loss) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Realized losses on securities available for sale	$ 855,000	$ (43,000)
Realized gains on cash flow hedges	68,000	61,000
Actuarial losses	2,331,000	3,594,000
Income before income taxes	5,552,000	5,821,000
Net Income: Tax Effect	50,000	14,000
Net income	5,602,000	5,835,000
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net income	682,000	(1,052,000)
Unrealized Gains and Losses on Available for Sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Realized losses on securities available for sale	855,000	(43,000)
Income before income taxes	855,000	(43,000)
Net Income: Tax Effect	(180,000)	9,000
Net income	675,000	(34,000)
Unrealized Gains and Losses on Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Realized gains on cash flow hedges	9,000
Income before income taxes	9,000
Net Income: Tax Effect	(2,000)
Net income	$ 7,000
Amortization of defined benefit pension items [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Actuarial losses		(1,394,000)
Income before income taxes		(1,289,000)
Net Income: Tax Effect		271,000
Net income		(1,018,000)
ASU 2018-02 [Member] | Amortization of defined benefit pension items [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income before income taxes		$ 105,000