Pension and Post-Retirement Benefits (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
United States Pension Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contribution	$ 2,258	$ 0
Estimated future employer contributions in current fiscal year	6,774
Non-US Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contribution	390	$ 0
Estimated future employer contributions in current fiscal year	$ 459