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Variable Interest Entities (VIEs) - Condensed Consolidating Schedules of Statements of Comprehensive Income (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 29, 2018 | Sep. 29, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 30, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Statement of Comprehensive Income [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 223,132 | $ 210,583 | $ 211,621 | $ 212,953 | $ 207,939 | $ 193,360 | $ 192,306 | $ 196,643 | $ 858,289 | $ 790,248 | $ 712,898
Cost of goods sold |  |  |  |  |  |  |  |  | 283,397 | 268,216 | 234,560
Gross profit | 148,331 | 140,753 | 142,147 | 143,661 | 138,652 | 124,065 | 126,901 | 132,414 | 574,892 | 522,032 | 478,338
Operating expenses: |  |  |  |  |  |  |  |  |  |  |
Selling, general and administrative |  |  |  |  |  |  |  |  | 289,456 | 276,292 | 254,707
Research and development |  |  |  |  |  |  |  |  | 76,967 | 61,953 | 57,686
Litigation settlement, award and/or defense costs |  |  |  |  |  |  |  |  | 425 | 0 | (270,000)
Total operating expenses |  |  |  |  |  |  |  |  | 366,848 | 338,245 | 42,393
Operating income | 53,906 | 48,641 | 51,612 | 53,885 | 44,726 | 43,061 | 43,849 | 52,151 | 208,044 | 183,787 | 435,945
Non-operating (income) expense |  |  |  |  |  |  |  |  | (5,732) | (2,013) | 2,429
Income before provision for income taxes |  |  |  |  |  |  |  |  | 213,776 | 185,800 | 433,516
Provision for income taxes |  |  |  |  |  |  |  |  | 20,233 | 61,011 | 122,419
Net income |  |  |  |  |  |  |  |  | $ 193,543 | 124,789 | 311,097
Net income | $ 46,934 | $ 57,126 | $ 43,853 | $ 45,630 | $ (7,735) | $ 35,853 | $ 45,138 | $ 51,533 |  | $ 124,789 | $ 311,097

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