Earnings per Share - Diluted earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income (loss) available to Virtusa common stockholders	$ (193)	$ 4,747
Net income (loss) available to Virtusa common stockholders and assumed conversion	$ (193)	$ 4,747
Denominator:
Basic weighted average common shares outstanding (in shares)	30,168,174	30,167,910
Dilutive effect of employee stock options and unvested restricted stock awards and restricted stock units		766,501
Weighted average shares-diluted (in shares)	30,168,174	30,934,411
Diluted earnings (loss) per share available to Virtusa common stockholders (in dollars per share)	$ (0.01)	$ 0.15