Accumulated Other Comprehensive Income (Loss) (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Unrealized gains and losses on available for sale securities
Realized losses on securities available for sale	$ 43	$ 188
Total before taxes	(43)	(188)
Income tax provision (benefit)	(14)	(659)
Net of tax	(34)	(149)
Amortization of defined benefit pension items
Actuarial losses	3,594	2,458
Income tax (benefit) expense	(14)	(659)
Net income	5,835	5,904
Reclassification out of Accumulated Other Comprehensive Income [Member]
Amortization of defined benefit pension items
Net income	(1,052)	(127)
Unrealized Gains and Losses on Available for sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Unrealized gains and losses on available for sale securities
Realized losses on securities available for sale	(43)	(188)
Total before taxes	(43)	9
Income tax provision (benefit)	9	(2)
Net of tax	(34)	7
Amortization of defined benefit pension items
Income tax (benefit) expense	9	(2)
Amortization of Defined Benefit Pension Items [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Unrealized gains and losses on available for sale securities
Income tax provision (benefit)	271	36
Amortization of defined benefit pension items
Actuarial losses	(1,394)	(170)
Total before taxes	(1,289)	(170)
Income tax (benefit) expense	271	36
Net of tax	(1,018)	(134)
ASU 2018-02 [Member] | Amortization of Defined Benefit Pension Items [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Amortization of defined benefit pension items
Total before taxes	$ 105
ASU 2016-01 [Member] | Unrealized Gains and Losses on Available for sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Unrealized gains and losses on available for sale securities
Total before taxes		$ 197