Carrying value of Equity Method and Other Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning balance	$ 81,836	$ 22,325	$ 80,779	$ 12,649
Additions	12,600	18,459	19,600	28,135
Disposals	(750)		(750)
Change in fair value, net	23,350		17,407
Ending balance	$ 117,036	$ 40,784	$ 117,036	$ 40,784