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Employee Benefit Plans (Schedule of Reconciliation of Balances in AOCI) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Net gain (loss) arising during period $ (557) $ (4,321) $ (5,171)
Pension Plan [Member]      
Accumulated other comprehensive loss at beginning of fiscal year (3,466) (1,133)  
Net gain (loss) arising during period (412) (3,825)  
Prior service cost  
Transition Obligation  
Amortization of unrecognized actuarial loss 238  
Amortization of prior service cost and transition obligation  
Tax (expense) benefit of changes during the year, net (52) 1,492  
Accumulated other comprehensive gain (loss) at end of fiscal year $ (3,692) $ (3,466) $ (1,133)