Income Taxes - Income tax holiday and other (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Apr. 01, 2019	Mar. 31, 2020 USD ($) a $ / shares	Mar. 31, 2019 USD ($) $ / shares	Mar. 31, 2018 USD ($) $ / shares
Income Taxes
Parcel of land (in acres) | a		6.3
Consecutive period of income tax exemption		10 years
Income tax benefits total eligibility period		15 years
Cash, cash equivalents, short-term investments and long-term investments available for distribution if not indefinitely reinvested		$ 194,789
Total amount of unrecognized tax benefits that would reduce income tax expense and the effective income tax rate, if recognized		6,627	$ 6,744	$ 7,544
Unrecognized tax benefits to be realized through settlement with tax authorities or expiration of statute of limitations during next twelve months		$ 10
Virtusa India Private Limited
Income Taxes
Income tax exemption period		12 years
India
Income Taxes
Effective tax rate (as a percent)	25.17%		34.90%
India and Sri Lanka
Income Taxes
Increase in net income due to income tax holiday		$ 126	$ 5,778	$ 7,727
Increase in diluted earning per share due to income tax holiday (in dollars per share) | $ / shares		$ 0.00	$ 0.19	$ 0.26