Leases - Summary of Components of Operating Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating lease costs	$ 2,514		$ 4,677
Short-term lease costs	67		93
Variable lease costs	198		337
Less: Sublease income	(28)		(56)
Total operating lease costs	$ 2,751	$ 2,027	$ 5,051	$ 4,055