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Employee Benefit Plans (Schedule of Reconciliation of Balances in AOCI) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Net gain (loss) arising during period $ (4,321) $ (5,171) $ 8,765
Pension Plan [Member]      
Accumulated other comprehensive loss at beginning of fiscal year (1,133) 2,183  
Net gain (loss) arising during period $ (3,825) $ (5,436)  
Prior service cost  
Transition Obligation  
Amortization of unrecognized actuarial loss  
Amortization of prior service cost and transition obligation  
Tax (expense) benefit of changes during the year, net $ 1,492 $ 2,120  
Accumulated other comprehensive gain (loss) at end of fiscal year $ (3,466) $ (1,133) $ 2,183