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Nature of Operations and Summary of Significant Accounting Policies - Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 04, 2015
Jan. 03, 2015
Accounting Policies [Abstract]    
Raw Materials and Supplies $ 22,436us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves $ 24,403us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves
Work in Process 15,977us-gaap_InventoryWorkInProcessNetOfReserves 11,259us-gaap_InventoryWorkInProcessNetOfReserves
Finished Goods 22,231us-gaap_InventoryFinishedGoodsNetOfReserves 19,561us-gaap_InventoryFinishedGoodsNetOfReserves
Inventories $ 60,644us-gaap_InventoryNet $ 55,223us-gaap_InventoryNet