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Employee Benefit Plans (Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation [Abstract]      
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax $ (1,092) $ 838 $ 157
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax 254 (1,211) (58)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax (838) (373) $ 99
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax 7,652 6,560  
Underfunded pension liability, deferred tax benefit (1,781) (1,527)  
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax $ 5,871 $ 5,033