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Employee Benefit Plans (Schedule of Amounts that Will Be Amortized from Other Comprehensive Loss) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	$ 12
Defined Benefit Plan, Future Amortization of Gain (Loss)	1,057
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year, Total	1,069
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)	146
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year, Total	$ 143