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Inventories (Details) - USD ($)
$ in Thousands
Oct. 01, 2016
Jan. 02, 2016
Inventory Disclosure [Abstract]    
Finished product $ 174,727 $ 164,428
Work in process 92,677 84,474
Raw Material 39,239 48,401
Supplies and other 52,452 47,280
Inventories $ 359,095 $ 344,583