Income Taxes - Balance Sheet Location of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 10,942	$ 9,594	$ 11,727	$ 8,695
Deferred tax assets, net
Income Tax Contingency [Line Items]
Unrecognized tax benefits	486	0
Income taxes payable
Income Tax Contingency [Line Items]
Unrecognized tax benefits	7	0
Income tax liability
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 10,449	$ 9,594