Interest Rate Cap Agreements (Schedule of Fair Value of Derivative Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021
Derivatives Fair Value [Line Items]
Other noncurrent assets, net	$ 542,100	$ 430,141
Accrued expenses	(473,470)	(484,293)
Other long-term liabilities	(64,861)	(65,572)
Fair Values of Derivative Instruments Asset (Liability) Derivatives	(2,552)
Designated as Hedging Instrument [Member] | Interest Rate Cap Agreements [Member]
Derivatives Fair Value [Line Items]
Other noncurrent assets, net	3,876
Accrued expenses	(1,331)	(22,360)
Other long-term liabilities		(365)
Fair Values of Derivative Instruments Asset (Liability) Derivatives	$ 2,545	$ (22,725)