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Earning Per Share - Additional Information (Detail) - shares	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Earnings per share [abstract]
Shares excluded from the calculation of diluted EPS options and RSUs since their effect is anti-dilutive	33,025	27,350	5,200

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- References

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- Definition

Shares excluded from computation of diluted earnings per share since their effect is anti-dilutive.

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No definition available.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration