Other (Income), net Level 4 (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Component of Operating Other Cost and Expense [Line Items]
Business interruption insurance sublimit	$ 5,000,000
Gains (Losses) on Sales of Assets [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(227,000)	(75,000)	(313,000)	(138,000)
Foreign Currency Gain (Loss) [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	1,355,000	(9,000)	330,000	(521,000)
Other Operating Expense [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(84,000)	1,000	(417,000)	(79,000)
Interest Income [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(13,000)	(30,000)	(15,000)	(85,000)
Rents And Royalties Income Loss [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(255,000)	(382,000)	(595,000)	(833,000)
gain loss on insurance recovery [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	(101,000)	(69,000)	(3,467,000)	(779,000)
Legal entity realignment [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	1,860,000	711,000	1,860,000	711,000
RegistrationExpenseEuronext [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	683,000	0	923,000	0
Component of Other Income, Nonoperating, Name [Domain]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	3,218,000	147,000	(1,694,000)	(1,724,000)
Gainlossonbusinessinterruptioninsuranc [Member] | gain loss on insurance recovery [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)			$ (3,400,000)