Inventories (Details) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Inventories [Abstract]
Raw materials and supplies	$ 159,387,000	$ 118,691,000
Work in process	186,281,000	160,368,000
Finished goods	67,597,000	64,075,000
Inventory, gross, total	413,265,000	343,134,000
Reserves	(4,938,000)	(2,716,000)
Inventory, net, total	408,327,000	340,418,000
Costs in excess of normal absorption	$ 300,000	$ 1,400,000