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RESTRUCTURING (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Sep. 30, 2017 | Oct. 01, 2016 | Nov. 01, 2017 | Apr. 01, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and turnaround costs | $ 5,787 | $ 1,597 | $ 8,270 | $ 20,413 |  |
Restructuring liability | 4,333 |  | 4,333 |  |  | $ 7,468
Restructuring liability payable in next twelve months | 3,900 |  | 3,900 |  |  |
Restructuring costs | 151 | (354) | 1,207 | 16,032 |  |
Turnaround costs | 5,636 | 1,951 | 7,063 | 4,381 |  |
Severance and Other Employee Costs |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring liability | 3,575 |  | 3,575 |  |  | $ 7,001
Restructuring costs |  |  | 446 |  |  |
2017 Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and turnaround costs | $ 5,200 | $ 1,100 | $ 7,700 | $ 18,800 |  |
Subsequent Event [Member] | 2018 Program [Member] | Minimum |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Expected cost |  |  |  |  | $ 50,000 |
Subsequent Event [Member] | 2018 Program [Member] | Minimum | Severance and Other Employee Costs |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Expected cost |  |  |  |  | 35,000 |
Subsequent Event [Member] | 2018 Program [Member] | Maximum |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Expected cost |  |  |  |  | 60,000 |
Subsequent Event [Member] | 2018 Program [Member] | Maximum | Severance and Other Employee Costs |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Expected cost |  |  |  |  | $ 40,000 |

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