Employee Benefit Plans (Schedule of Expected Future Benefit Payments) (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Defined Benefit Plan, Expected Future Benefit Payments in Year One	$ 10,993
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	8,228
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	8,141
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	10,200
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	9,533
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	57,489
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Defined Benefit Plan, Expected Future Benefit Payments in Year One	753
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	913
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	1,095
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	1,281
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	1,535
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	$ 11,534