Inventory (Details) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Components of inventories
Raw materials	$ 63,600,000	$ 59,000,000
Work in process	169,000,000	142,200,000
Finished goods	78,300,000	87,900,000
Total inventory	$ 310,934,000	$ 289,066,000