Equity Method Investment in Change Healthcare LLC (Summarized Financial Information of the Joint Venture) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Equity Method Investment in Change Healthcare LLC [Abstract]
Total revenue	$ 808,226	$ 821,937	$ 2,459,593	$ 2,445,390
Cost of operations (exclusive of depreciation and amortization)	339,413	339,485	998,943	1,007,328
Customer postage	55,693	58,788	171,288	180,706
Net income (loss)	$ 31,191	$ 13,009	$ 102,973	$ 138,955