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Employee Benefit Plans (Schedule of Reconciliation of Prepaid Pension Costs) (Details) - SERP [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Prepaid pension cost (liability) as of beginning of fiscal year $ (6,816) $ (6,848)  
Net periodic pension cost for fiscal year (328) (263) $ (406)
Benefits paid 342 295 172
Prepaid pension cost (liability) as of end of fiscal year $ (6,802) $ (6,816) $ (6,848)