Comprehensive Income (Loss) (Schedule of Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss)	$ 1,888	$ (11,961)	$ (11,195)
Unrealized Gain (Loss) on Securities Available for Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss)	5,214	(12,390)	(11,513)
Deferred tax asset (liability)	(1,198)	2,896	2,691
Total accumulated other comprehensive income (loss)	4,016	(9,494)	(8,822)
Additional Pension Asset (Liability)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss)	(2,764)	(3,220)	(3,097)
Deferred tax asset (liability)	636	753	724
Total accumulated other comprehensive income (loss)	(2,128)	(2,467)	(2,373)
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss)	$ 1,888	$ (11,961)	$ (11,195)