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Business Segments - (Details) $ in Thousands | 3 Months Ended
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Jul. 05, 2020 USD ($) segment | Jun. 30, 2019 USD ($)
Segment Reporting Information [Line Items] |  |
Number of reportable segments | segment | 3 |
Net sales | $ 704,924 | $ 780,230
Operating earnings by segment | 53,220 | 68,336
Restructuring charges | 1,387 | 2,372
Energy Systems |  |
Segment Reporting Information [Line Items] |  |
Net sales | 353,387 | 353,893
Operating earnings by segment | 22,085 | 23,587
Restructuring charges | 512 | 1,110
Motive Power |  |
Segment Reporting Information [Line Items] |  |
Net sales | 262,834 | 344,387
Operating earnings by segment | 27,276 | 37,098
Restructuring charges | 762 | 558
Specialty |  |
Segment Reporting Information [Line Items] |  |
Net sales | 88,703 | 81,950
Operating earnings by segment | 5,246 | 10,023
Restructuring charges | $ 113 | $ 704

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