Employee Benefit Plans (Amounts Included in Other Comprehensive Loss not Recognized in Net Periodic Benefit Cost) (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior service cost	$ 0
Net actuarial loss	11,904
Other postretirement benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior service cost	(39)
Net actuarial loss	$ (185)