Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Significant Accounting Policies [Line Items]
Equity compensation expense	$ 24,807	$ 10,944	$ 74,718	$ 34,858
Unrecognized compensation expense	197,183		197,183
Allowance for credit losses	$ 23,370	$ 24,003	$ 23,370	$ 24,003	$ 24,126	$ 22,360