Pension and Other Postretirement Benefits (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
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	$ 417,118	$ 380,030
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	312,451	315,524
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	354,287	321,775
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	256,518	269,896
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	62,831	58,255
Fair value of plan assets, related to pension plans with benefit obligations in excess of plan assets	$ 55,933	$ 45,628