| RESTRUCTURING - Restructuring costs (Details) - USD ($) $ in Thousands | 3 Months Ended | |
|---|---|---|
| Mar. 30, 2019 | Mar. 31, 2018 | |
| Restructuring and Related Activities [Abstract] | ||
| Severance and employee-related benefits | $ 13,157 | $ 1,936 | 
| Asset impairments | 1,596 | 0 | 
| Inventory write-downs | 4,403 | 0 | 
| Contract termination and other | 3,660 | 0 | 
| Total restructuring charges | $ 22,816 | $ 1,936 | 
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- References No definition available. 
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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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