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Business Segments - Additional Information (Detail) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2019 USD ($) Country | Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($)
Segment Reporting Information [Line Items] |  |  |
Operations in number of countries | Country | 100 |  |
Property, plant, and equipment, net | $ 409,439 | $ 390,260 | $ 348,549
United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of sales to customers | 48.50% | 49.20% | 50.00%
Property, plant, and equipment, net | $ 202,985 | $ 176,144 |

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