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Inventories (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Inventory Disclosure [Abstract]      
Raw materials $ 213,020 $ 215,018 $ 204,841
Work-in-process 113,393 118,947 104,842
Finished goods 389,073 371,561 358,783
Other 13,931 13,938 14,831
Inventory, Gross, Total 729,417 719,464 683,297
Adjustment to value inventory at cost on the LIFO method (91,326) (91,326) (103,021)
Inventories $ 638,091 $ 628,138 $ 580,276