Pension and Other Postretirement Benefits (Details 6) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	$ (15,741)	[1]	$ (41,355)	[1]	$ (5,517)	[1]
Defined benefit pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service cost	(98)
Net loss	(22,339)
Amortization of prior service costs (credits)	554
Amortization of actuarial loss	8,241
Foreign exchange rate changes	(912)
Divestiture	(502)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(15,056)
Other postretirement benefit plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service cost	0
Net loss	(373)
Amortization of prior service costs (credits)	(984)
Amortization of actuarial loss	671
Foreign exchange rate changes	1
Divestiture	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	$ (685)

[1] Net of tax of $(7,994), $(25,605) and $(2,340) for the years ended December 31, 2012, 2011 and 2010, respectively.