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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Schedule of Inventory [Line Items]      
Raw materials $ 170,350 $ 191,590 $ 174,895
Work-in-process 115,282 116,790 114,306
Finished goods 358,319 327,810 346,594
Other 13,497 13,781 13,579
Inventory, Gross, Total 657,448 649,971 649,374
Adjustment to value inventory at cost on the LIFO method (95,937) (95,823) (68,949)
Inventories $ 561,511 $ 554,148 $ 580,425