Revenue Recognition (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 10, 2020
Revenue Recognition [Abstract]
Percentage of deferred revenue balance expected to be recognized in one year or less	94.00%
Deferred revenue	$ 25,601	$ 0
Deferred revenues assumed			$ 311,200
Deferred revenue, revenue recognized		$ 0
Remaining performance obligation	$ 1,141,000