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Summary of Significant Accounting Policies (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
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The components of accumulated other comprehensive income (loss): |  |  |
Unrealized gain (loss) on securities available for sale | $ (3,085) | $ (1,163) | $ (691)
Deferred tax asset (liability) | 1,138 | 454 | 270
Net unrealized gain (loss) on securities available for sale | (1,947) | (709) | (421)
Additional pension asset (liability) | (5,012) | (4,657) | (257)
Deferred tax asset (liability) | 1,852 | 1,816 | 100
Net additional pension asset (liability) | (3,160) | (2,841) | (157)
Total accumulated other comprehensive income (loss) | $ (5,107) | $ (3,550) | $ (578)

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