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Inventories - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Raw materials $ 50,862 $ 50,204
Work in process 33,857 30,604
Finished goods 34,115 39,028
Inventories $ 118,834 $ 119,836