Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (80,021)
Other comprehensive income before reclassifications	6,899
Postretirement plan remeasurement	8,794
Postretirement plan change in benefits	4,864
Interest expense related to swaps reclassified to the Statement of Operations, net of tax	(854)
Pension and postretirement liability adjustments reclassified to Statement of Operations, net of tax	1,417
Net current period other comprehensive income	21,120
Ending balance	(58,901)
Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(7,659)
Other comprehensive income before reclassifications	3,998
Postretirement plan remeasurement
Postretirement plan change in benefits
Interest expense related to swaps reclassified to the Statement of Operations, net of tax
Pension and postretirement liability adjustments reclassified to Statement of Operations, net of tax
Net current period other comprehensive income	3,998
Ending balance	(3,661)
Pension and Postretirement Liability Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(69,484)
Other comprehensive income before reclassifications	538
Postretirement plan remeasurement	8,794
Postretirement plan change in benefits	4,864
Interest expense related to swaps reclassified to the Statement of Operations, net of tax
Pension and postretirement liability adjustments reclassified to Statement of Operations, net of tax	1,417
Net current period other comprehensive income	15,613
Ending balance	(53,871)
Derivative Valuation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,878)
Other comprehensive income before reclassifications	2,363
Postretirement plan remeasurement
Postretirement plan change in benefits
Interest expense related to swaps reclassified to the Statement of Operations, net of tax	(854)
Pension and postretirement liability adjustments reclassified to Statement of Operations, net of tax
Net current period other comprehensive income	1,509
Ending balance	$ (1,369)