Pension and Other Postretirement Benefits (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
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	$ 469,464	$ 417,118
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	357,882	312,451
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	396,695	354,287
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	294,040	256,518
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	72,769	62,831
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	$ 63,842	$ 55,933