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Summary of Projected Benefit Obligation, Accumulated Benefit Obligation and Fair Value of Plan Assets (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
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Compensation And Retirement Disclosure [Abstract] |  |  |
Projected Benefit Obligation | $ 33,909 | $ 35,844 | $ 36,701
Accumulated Benefit Obligation | 33,909 | 35,844 |
Fair Value of Plan Assets | $ 36,313 | $ 37,907 | $ 39,009

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