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Acquisitions - Pro Forma Information Adjustments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 29, 2018 | Sep. 29, 2018
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Net income | $ 56,060 | $ 179,264
Amortization |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Net income | 3,104 | 8,289
Transaction costs |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Net income | 0 | 9,976
Amortization of inventory step-up |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Net income | 0 | 36,927
Stock compensation |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Net income | 421 | 5,110
Income tax impact of above items |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Net income | $ (1,011) | $ (14,290)

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