Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Statements of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ (93,935)	$ (18,591)	$ (131,451)	$ (36,092)
Other comprehensive income (loss):
Unrealized gain (loss) on available for sale debt securities of the Joint Venture, net of taxes	1,173		1,173
Changes in fair value of interest rate swap, net of taxes	(1,310)	1,478	(6,741)	2,260
Change associated with foreign currency translation	1,583	566	1,809	(2,027)
Other comprehensive income (loss)	1,446	2,044	(3,759)	233
Total comprehensive income (loss)	$ (92,489)	$ (16,547)	$ (135,210)	$ (35,859)