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Equity Method Investments and Related-Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Schedule of Equity Method Investments [Line Items] |  |  |  |
Foreign currency translation adjustments, net of tax |  | $ (11,621) | $ (9,985) | $ 15,785
Income from equity method investments |  | 4,470 | 2,998 | 1,978
Euro Infrastructure Co [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Payments, net of transaction costs, to acquire the issued shares in investment | $ 139,500 |  |  |
Equity method investment ownership percentage | 49.00% |  |  |
Foreign currency translation adjustments, net of tax |  | $ (3,800) | (5,600) | 12,700
Maximum useful life of intangible assets basis difference, years |  | 11 years |  |
Weighted average useful life of intangible assets basis difference, years |  | 10 years |  |
Maximum useful life of tangible assets basis difference, years |  | 11 years |  |
Weighted average useful life of tangible assets basis difference, years |  | 11 years |  |
Income from equity method investments |  | $ 4,500 | $ 3,000 | $ 2,000
Retained earnings of undistributed cumulative earnings in equity interests, net of tax |  | $ 10,800 |  |

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