Other (Income) Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Gains (Losses) on Sales of Assets [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	$ (487)	$ (176)	$ 90
Income (Loss) from Equity Method Investments [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(274)	(376)	(92)
Foreign Currency Gain (Loss) [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	1,800	1,032	(331)
Interest Income [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(138)	(249)	(138)
Non income tax related (benefit) expense [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	0	0	(2,500)
Rents And Royalties Income Loss [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(1,716)	(1,550)	(1,358)
gain loss on insurance recovery [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(1,014)	0	0
Legal entity realignment [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	711	0	0
Other Operating Expense [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	199	(886)	1,127
Component of Other Expense, Nonoperating, Name [Domain]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(919)	(2,205)	(3,202)
Euro Loss June [Member] | Foreign Currency Gain (Loss) [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)		1,400
Gain on settlement of non income tax [Member] | Non income tax related (benefit) expense [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)			2,500
Realized Gain (Loss) on Sale of Investments [Member] | Other Operating Expense [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)		$ 800