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Inventories (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Inventory Disclosure [Abstract]      
Raw materials $ 204,195 $ 184,714 $ 190,546
Work-in-process 121,144 115,308 123,557
Finished goods 516,931 338,562 517,897
Other 14,086 13,541 12,807
Inventory, Gross, Total 856,356 652,125 844,807
Adjustment to value inventory at cost on the LIFO method (103,021) (103,360) (96,580)
Inventories $ 753,335 $ 548,765 $ 748,227