Pension and Other Postretirement Benefits (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
U.S. Pension Benefits [Member]
Accumulated other comprehensive loss (pre-tax):
Net actuarial loss	$ 84,825	$ 78,307
Prior service cost	2,113	2,825
Total (pre-tax)	86,938	81,132
Foreign Pension Benefits [Member]
Accumulated other comprehensive loss (pre-tax):
Net actuarial loss	28,155	23,848
Prior service cost	0	0
Total (pre-tax)	28,155	23,848
Other Postretirement Benefits [Member]
Accumulated other comprehensive loss (pre-tax):
Net actuarial loss	6,403	7,098
Prior service cost	227	312
Total (pre-tax)	$ 6,630	$ 7,410