Other (Income) Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Component of Other Expense, Nonoperating, Name [Domain]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	$ (4,121)	$ (919)	$ (2,205)
Gains (Losses) on Sales of Assets [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(201)	(487)	(176)
Income (Loss) from Equity Method Investments [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(646)	(274)	(376)
Foreign Currency Gain (Loss) [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	142	1,800	1,032
Interest Income [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(319)	(138)	(249)
Rents And Royalties Income Loss [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(1,033)	(1,716)	(1,550)
gain loss on insurance recovery [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(4,490)	(1,014)	0
Legal entity realignment [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	1,860	711	0
RegistrationExpenseEuronext [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	923	0	0
Other Operating Expense [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(357)	199	(886)
Gainlossonbusinessinterruptioninsuranc [Member] | gain loss on insurance recovery [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	4,389
gain loss on fire insurance recovery [Member] | gain loss on insurance recovery [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)		$ 1,000