Pension and Other Postretirement Benefits (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
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	$ 327,038	$ 58,646
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	251,965	19,353
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	297,067	31,231
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	234,305	0
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	29,971	27,415
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	$ 17,660	$ 19,353