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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Inventory Disclosure [Abstract]      
Raw materials $ 190,546 $ 158,963 $ 168,903
Work-in-process 123,557 104,811 133,126
Finished goods 517,897 333,978 508,170
Other 12,807 14,398 13,697
Inventory, Gross, Total 844,807 612,150 823,896
Adjustment to value inventory at cost on the LIFO method (96,580) (96,580) (102,891)
Inventories $ 748,227 $ 515,570 $ 721,005