(Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year) (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Prior service cost/(credit)	$ (2,242)
Cumulative net loss	4,302
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service cost/(credit)	300
Cumulative net loss	3,321
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service cost/(credit)	(2,542)
Cumulative net loss	$ 981