Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Reconciliation of Unrecognized Tax Benefits
Unrecognized tax benefits, beginning balance	$ 20,165	$ 1,568	$ 1,450
Increases related to current year tax positions	598	129	397
Increases related to the Alpha acquisition	769	7,840	0
Increases related to prior year tax positions	0	11,463	11
Decreases related to prior tax positions due to foreign currency translation	(11,463)	(544)	0
Decreases related to prior year tax positions	0	(93)	(1)
Lapse of statute of limitations	(2,274)	(198)	(289)
Unrecognized tax benefits, ending balance	$ 7,795	$ 20,165	$ 1,568

Unrecognized Tax Benefits Decrease Resulting from Prior Year Tax Position Due to Foreign Currency Translation

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
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-Section 50
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- Definition

Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of expense for penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

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- Definition

Amount of increase in unrecognized tax benefits resulting from acquisitions.

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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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