Employee Benefit Plans (Schedule of Amounts that Will Be Amortized from Other Comprehensive Loss) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	$ 0
Defined Benefit Plan, Future Amortization of Gain (Loss)	1,077
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year, Total	1,077
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	(3)
Defined Benefit Plan, Future Amortization of Gain (Loss)	116
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year, Total	$ 113