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Inventories (Details) - USD ($)
$ in Thousands
Jan. 02, 2016
Jan. 03, 2015
Inventory Disclosure [Abstract]    
Finished products $ 68,478 $ 65,126
Materials and work in process 81,860 84,677
LIFO reserve (25,110) (28,012)
Inventories, net $ 125,228 $ 121,791