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Comprehensive Income (Schedule of Components of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
The components of accumulated other comprehensive income (loss):        
Total accumulated other comprehensive income (loss) $ (1,728) $ (3,550) $ (1,059) $ (578)
Unrealized gain (loss) on securities available for sale [Member]        
The components of accumulated other comprehensive income (loss):        
Total accumulated other comprehensive income (loss) 1,722 (1,163) (1,433)  
Deferred tax asset (liability) (671) 454 560  
Total accumulated other comprehensive income (loss) 1,051 (709) (873) (421)
Additional pension asset (liability) [Member]        
The components of accumulated other comprehensive income (loss):        
Total accumulated other comprehensive income (loss) (4,555) (4,657) (304)  
Deferred tax asset (liability) 1,776 1,816 118  
Total accumulated other comprehensive income (loss) $ (2,779) $ (2,841) $ (186) $ (157)