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Quarterly Financial Data (Unaudited) - Summary of Impact to Net Sales and SD&A Expenses (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2018
Jul. 01, 2018
Apr. 01, 2018
Dec. 31, 2017
Oct. 01, 2017
Jul. 02, 2017
Apr. 02, 2017
Dec. 31, 2017
Jan. 01, 2017
Distribution Rights and Sponsorship Privileges [Member]                  
Impact to net sales and SD&A expenses $ (7,628) $ (7,269) $ (7,307) $ (8,519) $ (9,965) $ (9,487) $ (8,109) $ 36,100 $ 26,300