Leases - Schedule of lease costs (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease cost, net	[1]	$ 13,640	$ 13,614	$ 10,999
Variable lease cost		6,425	5,809	4,705
Total lease cost		$ 20,065	$ 19,423	$ 15,704

[1] For the year ended March 31, 2020, included in operating lease cost is a $4.9 million reduction to lease cost related to a lease termination.