Income Taxes - Narrative (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2018 USD ($)
Income Tax Disclosure [Abstract]
Adjustments to transition tax for accumulated foreign earnings	$ 480
Decrease in unrecognized tax benefits	36
Unrecognized tax benefits and penalties and interest	12,855
(Decrease) in unrecognized tax benefit expected to settle in next twelve months	(2,488)
Unrecognized tax benefits that would reduce income tax expense	$ 1,804