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RESTRUCTURING AND ASSET IMPAIRMENTS - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 24 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 28, 2019 | Sep. 29, 2018 | Sep. 28, 2019 | Sep. 29, 2018 | Dec. 29, 2018 | Jun. 29, 2019 | Jun. 30, 2018 | Dec. 30, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring costs | $ 2,653,000 | $ 4,675,000 | $ 5,887,000 | $ 7,169,000 |  |  |  |
Severance and other personnel related costs liability and lease obligation liabilities | 3,783,000 | 7,062,000 | 3,783,000 | 7,062,000 | $ 2,921,000 | $ 2,758,000 | $ 6,810,000 | $ 6,856,000
Accrued Compensation |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance and other personnel related costs liability and lease obligation liabilities | 3,800,000 | 2,600,000 | 3,800,000 | 2,600,000 |  |  |  |
RMS |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring costs | 381,000 | 0 | 1,323,000 | 0 | 20,100,000 |  |  |
Asset Impairments and Accelerated Depreciation | RMS |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring costs |  |  |  |  | 17,700,000 |  |  |
Severance and Transition Costs |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring costs | 2,473,000 | 4,649,000 | 4,184,000 | 7,121,000 |  |  |  |
Severance and Transition Costs | Other Noncurrent Liabilities |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance and other personnel related costs liability and lease obligation liabilities | $ 0 | $ 4,400,000 | $ 0 | $ 4,400,000 |  |  |  |
Severance and Transition Costs | RMS |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring costs |  |  |  |  | $ 1,200,000 |  |  |

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