Leases - Summary of Components of Operating Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease costs	$ 2,469		$ 7,146
Short-term lease costs	17		110
Variable lease costs	181		518
Less: Sublease income	(43)		(99)
Total operating lease costs	$ 2,624	$ 2,026	$ 7,675	$ 6,081