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Inventories - Components of Inventory (Detail) - USD ($)
$ in Thousands
Apr. 01, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 42,132 $ 32,647
Work-in-process 7,319 7,701
Finished goods 30,811 32,194
Total inventories $ 80,262 $ 72,542