Extended Product Warranty of Short and Long-Term Deferred Revenue and Customer Advances (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2018 |
Oct. 01, 2017 |
Sep. 30, 2018 |
Oct. 01, 2017 |
|
Product Warranty Liability [Line Items] | ||||
Balance at beginning of period | $ 25,971 | $ 29,377 | $ 24,438 | $ 28,200 |
Deferral of new extended warranty revenue | 7,232 | 2,636 | 19,072 | 17,126 |
Recognition of extended warranty deferred revenue | (5,586) | (5,521) | (15,893) | (18,834) |
Balance at end of period | $ 27,617 | $ 26,492 | $ 27,617 | $ 26,492 |