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Inventories (Details) - USD ($)
$ in Thousands
Apr. 02, 2016
Dec. 31, 2015
Inventory Items, Net Of Reserves Alternative [Abstract]    
Raw materials $ 92,701 $ 88,625
Work in progress 21,811 20,901
Finished goods 172,536 153,889
Total inventories $ 287,048 $ 263,415