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Inventories, net (Details) (USD $)
In Thousands
Jun. 30, 2011
Dec. 31, 2010
Inventories, net [Abstract]    
Raw materials $ 402,166 $ 349,628
Work in progress 212,387 161,597
Finished goods 323,931 253,910
Subtotal 938,484 765,135
Less LIFO reserve 55,972 51,025
Total $ 882,512 $ 714,110