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Retirement Plans - Summary Changes in Plan Assets and Benefit Obligations (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Changes in plan assets and benefit obligations: |  |  |
New prior service cost | $ 0 | $ 0 | $ 0
Net loss (gain) arising during the year | (753) | 3,793 | (99)
Effect of exchange rates on amounts included in AOCI | 1,909 | (804) | (1,984)
Amounts recognized as a component of net periodic benefit costs: |  |  |
Amortization of prior service cost | (46) | (43) | (45)
Amortization or settlement recognition of net loss | (1,484) | (1,250) | (1,659)
Total recognized in other comprehensive (income) loss | $ (374) | $ 1,696 | $ (3,787)

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