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Other Income - Narrative (Details) - USD ($)
$ in Thousands
6 Months Ended 9 Months Ended
Jul. 02, 2016
Sep. 30, 2017
Oct. 01, 2016
Schedule Of Other Income [Line Items]      
Gain on the sale of real estate   $ (37) $ 384
Proceeds from sale of real estate   $ 111 $ 409
Sweden [Member]      
Schedule Of Other Income [Line Items]      
Gain on the sale of real estate $ 317    
Proceeds from sale of real estate $ 368