Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Current:
U.S. Federal	$ 2,515
U.S. State	5,805	466
Foreign	2,789	102
Current income tax provision (benefit)	11,109	568
Deferred:
U.S. Federal	(47,052)	(113,523)	(15,468)
U.S. State	(1,249)	(30,297)	(3,127)
Foreign	2,005	(2)
Deferred income tax provision (benefit)	(46,296)	(143,822)	(18,595)
Total income tax provision (benefit)	$ (35,187)	$ (143,254)	$ (18,595)