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RESTRUCTURING (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 33 Months Ended |
--- | --- | --- | ---
Jun. 27, 2020 | Jun. 29, 2019 | Dec. 28, 2019 | Mar. 28, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and turnaround costs | $ 4,000 | $ 2,027 |  |
Restructuring liability | 2,539 |  |  | $ 2,648
Restructuring liability payable in next twelve months | 2,100 |  |  |
Turnaround costs | 2,935 | 1,058 |  |
2020 Program |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and turnaround costs | 3,500 |  |  |
Cumulative costs to date | 15,400 |  |  |
Restructuring liability | 1,761 |  |  | $ 1,136
2020 Program | Minimum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Expected cost | 60,000 |  |  |
2020 Program | Maximum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Expected cost | 70,000 |  |  |
2018 Program |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and turnaround costs | $ 500 | $ 2,000 | $ 58,700 |

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