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Employee Benefit Plans (Schedule of Changes in Level 3 Assets) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Fair value of plan assets at end of year $ 6,702
Significant Unobservable Inputs (Level 3) [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Unrealized gain 283
Fair value of plan assets at end of year $ 283