Income Taxes - Summary of Reconciliation in Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Liability for unrecognized tax benefits	$ 2,419	$ 4,762
Additions for current year tax positions		217
Additions for prior year tax positions	1,405
Reductions for prior year tax positions	(930)	(2,560)
Liability for unrecognized tax benefits	$ 2,894	$ 2,419