Income Taxes - Balance Sheet Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Deferred Tax Assets, Net, Classification [Abstract]
Net current deferred tax assets	$ 0	$ 0
Net current deferred tax liabilities	0	0
Net non-current deferred tax assets	61,857	73,158
Net non-current deferred tax liabilities	(28,689)	(59)
Net deferred tax assets (liabilities)	$ 33,168	$ 73,099