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Extended Product Warranty of Short and Long-Term Deferred Revenue and Customer Advances (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Apr. 01, 2018
Product Warranty Liability [Line Items]    
Balance at beginning of period $ 27,422 $ 24,438
Deferral of new extended warranty revenue 5,820 5,139
Recognition of extended warranty deferred revenue (6,000) (4,987)
Balance at end of period $ 27,242 $ 24,590