| LEASES - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands | Mar. 30, 2019 | Dec. 29, 2018 | Mar. 31, 2018 | 
|---|---|---|---|
| Assets | |||
| Operating lease assets, noncurrent | $ 77,305 | $ 0 | $ 0 | 
| Liabilities | |||
| Operating lease liabilities, current | 29,156 | 0 | 0 | 
| Operating lease liabilities, noncurrent | 51,533 | $ 0 | $ 0 | 
| Total lease liabilities | $ 80,689 | ||
| Weighted-average remaining lease term (in years) | |||
| Operating leases | 3 years 8 months 8 days | ||
| Weighted-average discount rate | |||
| Operating leases | 3.27% | 
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- Definition Weighted-Average Discount Rate [Abstract] No definition available. 
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- Definition Weighted-Average Remaining Lease Term [Abstract] No definition available. 
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- References No definition available. 
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- References No definition available. 
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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