Accumulated Other Comprehensive Income (Schedule of Changes in AOCI by Components) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Beginning balance	$ 73,707	$ 67,378
Net current period other comprehensive income (loss)	3,007	4,898
Reclassification for ASU	45,096	43,954
Ending balance	76,597	73,707
Accumulated Other Comprehensive Loss [Member]
Beginning balance	516	(4,299)
Other comprehensive income (loss) before reclassification	3,689	3,763
Amounts reclassified from accumulated other comprehensive income	(682)	1,135
Net current period other comprehensive income (loss)	3,007	4,898
Ending balance	3,518	516
Unrealized Gains and Losses on Available for Sale Securities [Member]
Beginning balance	516	(2,647)
Other comprehensive income (loss) before reclassification	3,727	3,129
Amounts reclassified from accumulated other comprehensive income	(675)	34
Net current period other comprehensive income (loss)	3,052	3,163
Ending balance	3,563	516
Unrealized Gains and Losses on Cash Flow Hedges [Member]
Beginning balance	0	0
Other comprehensive income (loss) before reclassification	(38)	0
Amounts reclassified from accumulated other comprehensive income	(7)	0
Net current period other comprehensive income (loss)	(45)	0
Ending balance	(45)	0
Amortization of defined benefit pension items [Member]
Beginning balance	0	(1,652)
Other comprehensive income (loss) before reclassification	0	634
Amounts reclassified from accumulated other comprehensive income	0	1,101
Net current period other comprehensive income (loss)	0	1,735
Ending balance	0	0
Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | ASU 2018-02 [Member] | Accumulated Other Comprehensive Loss [Member]
Reclassification for ASU	(5)	(83)
Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | ASU 2018-02 [Member] | Unrealized Gains and Losses on Available for Sale Securities [Member]
Reclassification for ASU	(5)	0
Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | ASU 2018-02 [Member] | Unrealized Gains and Losses on Cash Flow Hedges [Member]
Reclassification for ASU	0	0
Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | ASU 2018-02 [Member] | Amortization of defined benefit pension items [Member]
Reclassification for ASU	$ 0	$ (83)