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Litigation and Contingencies (Additional Information) (Details) - Licensing agreements [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Long-term Purchase Commitment [Line Items]        
Royalty expense, licensing agreements $ 0.6 $ 0.5 $ 1.1 $ 1.1
Advertising expense, licensing agreements $ 0.9 $ 0.7 $ 1.7 $ 1.6