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Inventories (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Inventory Disclosure [Abstract]      
Raw materials $ 204,841 $ 184,714 $ 181,034
Work-in-process 104,842 115,308 125,290
Finished goods 358,783 338,562 364,261
Other 14,831 13,541 14,285
Inventory, Gross, Total 683,297 652,125 684,870
Adjustment to value inventory at cost on the LIFO method (103,021) (103,360) (96,580)
Inventories $ 580,276 $ 548,765 $ 588,290