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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Inventory Disclosure [Abstract]      
Raw materials $ 168,903 $ 167,097 $ 176,091
Work-in-process 133,126 108,385 120,758
Finished goods 508,170 330,077 527,103
Other 13,697 13,259 13,365
Inventory, Gross, Total 823,896 618,818 837,317
Adjustment to value inventory at cost on the LIFO method (102,891) (102,891) (95,937)
Inventories $ 721,005 $ 515,927 $ 741,380