Translation Adjustments (Schedule of Effect of Translation on Cash Flow) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Intercompany Foreign Currency Balance [Line Items]
Change in cumulative translation adjustments	$ (13,070,000)	$ (10,208,000)	$ 36,972,000
Effect of exchange rate changes on cash and cash equivalents	(3,373,000)	(9,285,000)	(1,525,000)
Impairment of joint venture, translation effect			1,400,000
Other Noncurrent Liabilities [Member]
Intercompany Foreign Currency Balance [Line Items]
Effect of exchange rate changes on cash and cash equivalents	(1,209,000)	877,000	4,366,000
Deferred Taxes [Member]
Intercompany Foreign Currency Balance [Line Items]
Effect of exchange rate changes on cash and cash equivalents	1,204,000	2,562,000	(4,767,000)
Accounts Receivable [Member]
Intercompany Foreign Currency Balance [Line Items]
Effect of exchange rate changes on cash and cash equivalents	4,284,000	2,066,000	(8,187,000)
Inventories [Member]
Intercompany Foreign Currency Balance [Line Items]
Effect of exchange rate changes on cash and cash equivalents	2,756,000	(218,000)	(8,014,000)
Investment in Associated Companies [Member]
Intercompany Foreign Currency Balance [Line Items]
Effect of exchange rate changes on cash and cash equivalents	84,000	136,000	1,332,000
Property, Plant and Equipment, Net [Member]
Intercompany Foreign Currency Balance [Line Items]
Effect of exchange rate changes on cash and cash equivalents	2,789,000	(8,626,000)	(24,035,000)
Goodwill and Intangibles [Member]
Intercompany Foreign Currency Balance [Line Items]
Effect of exchange rate changes on cash and cash equivalents	2,449,000	4,665,000	(4,013,000)
Other Translation Adjustments [Member]
Intercompany Foreign Currency Balance [Line Items]
Effect of exchange rate changes on cash and cash equivalents	$ (2,660,000)	$ (539,000)	$ 4,821,000