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Business Segments - (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) | Oct. 01, 2017 USD ($) | Sep. 30, 2018 USD ($) segment | Oct. 01, 2017 USD ($)
Segment Reporting Information [Line Items] |  |  |  |
Number of reportable segments | segment |  |  | 3 |
Net sales | $ 660,462 | $ 617,289 | $ 1,331,392 | $ 1,239,914
Intersegment sales | 50,982 | 52,720 | 96,541 | 93,907
Operating earnings by segment | 63,357 | 64,364 | 127,536 | 134,336
Restructuring charges | (1,121) | (1,776) | (2,860) | (2,609)
Reserve power |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 313,338 | 292,238 | 637,356 | 597,415
Motive power |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 347,124 | 325,051 | 694,036 | 642,499
Total net sales |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 660,462 | 617,289 | 1,331,392 | 1,239,914
Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 388,574 | 341,504 | 781,148 | 696,107
Intersegment sales | 7,888 | 8,979 | 13,746 | 16,216
Operating earnings by segment | 48,306 | 44,156 | 96,042 | 97,943
Restructuring charges | 0 | (285) | 0 | (285)
EMEA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 203,997 | 197,856 | 414,491 | 396,933
Intersegment sales | 35,039 | 38,563 | 67,126 | 67,380
Operating earnings by segment | 13,829 | 17,802 | 31,032 | 31,576
Restructuring charges | (1,007) | (1,491) | (2,199) | (2,324)
Asia |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 67,891 | 77,929 | 135,753 | 146,874
Intersegment sales | 8,055 | 5,178 | 15,669 | 10,311
Operating earnings by segment | 2,343 | 4,182 | 3,848 | 7,426
Restructuring charges | (114) | 0 | (661) | 0
Non-cash charges | Asia |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Restructuring charges | $ 0 | $ 0 | $ (526) | $ 0

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