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Basis of Presentation and Summary of Significant Accounting Policies - Summary of Activity of Company's Accrued Warranty Liability (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance at Beginning of Period $ 13,026 $ 13,391
Accruals for Warranties 3,588 3,842
Settlements Made (4,115) (4,369)
Balance at End of Period $ 12,499 $ 12,864