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RESTRUCTURING (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 26, 2020 | Dec. 28, 2019 | Dec. 26, 2020 | Dec. 28, 2019 | Mar. 28, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and turnaround costs | $ 3,143 | $ 7,798 | $ 11,583 | $ 13,582 |
Restructuring liability | 1,115 |  | 1,115 |  | $ 2,648
Restructuring liability payable in next twelve months | 700 |  | 700 |  |
Turnaround costs | 3,235 | 7,181 | 10,683 | 10,653 |
2020 Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and turnaround costs | 3,100 | 3,900 | 11,100 | 3,900 |
Cumulative costs to date | 22,900 |  | 22,900 |  |
Restructuring liability | 595 |  | 595 |  | $ 1,136
2020 Program | Minimum |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Expected cost | 60,000 |  | 60,000 |  |
2020 Program | Maximum |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Expected cost | 70,000 |  | 70,000 |  |
2018 Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and turnaround costs |  | $ 3,900 | 500 | $ 6,800 |
Cumulative costs to date | $ 58,700 |  | $ 58,700 |  |

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