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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Inventory Disclosure [Abstract]      
Raw materials $ 185,848 $ 158,963 $ 161,853
Work-in-process 122,083 104,811 129,548
Finished goods 424,236 333,978 443,084
Other 13,136 14,398 14,176
Inventory, Gross, Total 745,303 612,150 748,661
Adjustment to value inventory at cost on the LIFO method (96,580) (96,580) (102,891)
Inventories $ 648,723 $ 515,570 $ 645,770