Retirement Plans - Summary Changes in Plan Assets and Benefit Obligations (Detail) - USD ($) $ in Thousands	12 Months Ended
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)

Defined Benefit Plan Amortization Of Unrecognized Gains Losses

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- Definition

Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income, Foreign Exchange Adjustment

+ References

No definition available.

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- Definition

Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income, Net Gain (Loss), Net of Tax

+ References

No definition available.

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- Definition

Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit from event reducing expected years of future service of present employees or eliminating accrual of defined benefits for some or all future services of present employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

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