Pension and Other Postretirement Benefits (Details 3) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Defined benefit pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, related to pension plans with benefit obligations in excess of plan assets	$ 450,673	$ 303,072
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	370,616	224,469
Defined benefit pension plans, U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, related to pension plans with benefit obligations in excess of plan assets	389,613	271,459
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	331,260	204,270
Defined benefit pension plans, Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, related to pension plans with benefit obligations in excess of plan assets	61,060	31,613
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	$ 39,356	$ 20,199