Other (Income), net Level 4 (Details) (USD $)	3 Months Ended			6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended
	Mar. 31, 2013 Proceeds from insurance recovery [Member]	Jun. 30, 2013 Gains (Losses) on Sales of Assets [Member]	Jun. 30, 2012 Gains (Losses) on Sales of Assets [Member]	Jun. 30, 2013 Gains (Losses) on Sales of Assets [Member]	Jun. 30, 2012 Gains (Losses) on Sales of Assets [Member]	Jun. 30, 2013 Income (Loss) from Equity Method Investments [Member]	Jun. 30, 2012 Income (Loss) from Equity Method Investments [Member]	Jun. 30, 2013 Income (Loss) from Equity Method Investments [Member]	Jun. 30, 2012 Income (Loss) from Equity Method Investments [Member]	Jun. 30, 2013 Foreign Currency Gain (Loss) [Member]	Jun. 30, 2012 Foreign Currency Gain (Loss) [Member]	Jun. 30, 2013 Foreign Currency Gain (Loss) [Member]	Jun. 30, 2012 Foreign Currency Gain (Loss) [Member]	Jun. 30, 2013 Other Operating Expense [Member]	Jun. 30, 2012 Other Operating Expense [Member]	Jun. 30, 2013 Other Operating Expense [Member]	Jun. 30, 2012 Other Operating Expense [Member]	Jun. 30, 2013 Interest Income [Member]	Jun. 30, 2012 Interest Income [Member]	Jun. 30, 2013 Interest Income [Member]	Jun. 30, 2012 Interest Income [Member]	Jun. 30, 2013 Rents And Royalties Income Loss [Member]	Jun. 30, 2012 Rents And Royalties Income Loss [Member]	Jun. 30, 2013 Rents And Royalties Income Loss [Member]	Jun. 30, 2012 Rents And Royalties Income Loss [Member]	Jun. 30, 2013 gain loss on insurance recovery [Member]	Jun. 30, 2012 gain loss on insurance recovery [Member]	Jun. 30, 2013 gain loss on insurance recovery [Member]	Jun. 30, 2013 Legal entity realignment [Member]	Jun. 30, 2012 Legal entity realignment [Member]	Jun. 30, 2013 Legal entity realignment [Member]	Jun. 30, 2012 Legal entity realignment [Member]	Jun. 30, 2013 RegistrationExpenseEuronext [Member]	Jun. 30, 2012 RegistrationExpenseEuronext [Member]	Jun. 30, 2013 RegistrationExpenseEuronext [Member]	Jun. 30, 2012 RegistrationExpenseEuronext [Member]	Jun. 30, 2013 Component of Other Income, Nonoperating, Name [Domain]	Jun. 30, 2012 Component of Other Income, Nonoperating, Name [Domain]	Jun. 30, 2013 Component of Other Income, Nonoperating, Name [Domain]	Jun. 30, 2012 Component of Other Income, Nonoperating, Name [Domain]	Jun. 30, 2012 gain loss on fire insurance recovery [Member] gain loss on insurance recovery [Member]	Mar. 31, 2012 Gainlossonbusinessinterruptioninsuranc [Member] gain loss on insurance recovery [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Nonoperating Income (Expense)	$ 865,000	$ (323,000)	$ (227,000)	$ (532,000)	$ (313,000)	$ (89,000)	$ (181,000)	$ (185,000)	$ (247,000)	$ 1,631,000	$ 1,355,000	$ 2,522,000	$ 330,000	$ (150,000)	$ 97,000	$ (185,000)	$ (170,000)	$ (219,000)	$ (13,000)	$ (590,000)	$ (15,000)	$ (213,000)	$ (255,000)	$ (443,000)	$ (595,000)	$ (7,000)	$ (101,000)	$ (546,000)	$ 0	$ 1,860,000	$ 0	$ 1,860,000	$ 0	$ 683,000	$ 0	$ 923,000	$ 630,000	$ 3,218,000	$ 41,000	$ (1,694,000)	$ (3,467,000)	$ 3,400,000