| Combined Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands | Mar. 30, 2019 | Dec. 29, 2018 | Mar. 31, 2018 | 
|---|---|---|---|
| Statement of Financial Position [Abstract] | |||
| Accounts receivable, allowance for doubtful accounts | $ 10,826 | $ 10,549 | $ 8,121 | 
| X | ||||||||||
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- References No definition available. 
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