Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (80,021)
Other comprehensive income before reclassifications	(10,343)
Transfers of pension and postretirement liability adjustments to income statement, net of tax	503
Net current period other comprehensive income	(9,840)
Ending balance	(89,861)
Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(7,659)
Other comprehensive income before reclassifications	(11,288)
Transfers of pension and postretirement liability adjustments to income statement, net of tax
Net current period other comprehensive income	(11,288)
Ending balance	(18,947)
Pension and Postretirement Liability Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(69,484)
Other comprehensive income before reclassifications	666
Transfers of pension and postretirement liability adjustments to income statement, net of tax	503
Net current period other comprehensive income	1,169
Ending balance	(68,315)
Derivative Valuation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,878)
Other comprehensive income before reclassifications	279
Transfers of pension and postretirement liability adjustments to income statement, net of tax
Net current period other comprehensive income	279
Ending balance	$ (2,599)