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Employee Benefit Plans (Schedule of Amounts Recognized in Other Comprehensive Income) (Details) - Pension Plan [Member] - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Net gain (loss) $ (5,682) $ (1,857)  
Prior service cost  
Amount recognized in AOCI before tax effect $ (5,682) $ (1,857)  
Tax (expense) benefit 2,216 724  
Net amount recognized as increase (decrease) to AOCI $ (3,466) $ (1,133) $ 2,183