Pension and Other Postretirement Benefits (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Defined benefit pension plans [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation	$ 40,652	$ 459,526
Accumulated benefit obligation	39,907	444,378
Fair value of plan assets	1,779	348,390
Total accumulated benefit obligation	444,096	480,027
Defined benefit pension plans, U.S. [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation	31,231	396,695
Accumulated benefit obligation	30,913	382,023
Fair value of plan assets	0	294,040
Defined benefit pension plans, Non-U.S. [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation	9,421	62,831
Accumulated benefit obligation	8,994	62,355
Fair value of plan assets	$ 1,779	$ 54,350