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Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Disclosure of income taxes [Line Items] |  |  |
Current taxes | $ 27,526 | $ 24,494 | $ 25,785
Deferred taxes | (1,807) | (9,063) | (8,255)
Income tax expense | 25,719 | 15,431 | 17,530
Foreign [member] |  |  |
Disclosure of income taxes [Line Items] |  |  |
Current taxes | 27,526 | 24,494 | 25,785
Deferred taxes | $ (1,807) | $ (9,063) | $ (8,255)

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