Interest Rate Cap Agreements (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Aug. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Derivative [Line Items]
Reclassified as interest expense	$ 1,203
Fair value derivative net liability	51,020
Interest Rate Cap Agreements [Member]
Derivative [Line Items]
Notional amount	$ 1,000,000
Derivative, maturity date	Mar. 31, 2024
Effective date	Mar. 31, 2020
Interest Rate Cap Agreements [Member] | Maximum [Member]
Derivative [Line Items]
Variable rate	1.00%
Legacy CHC and Joint Venture [Member] | Interest Rate Cap Agreements [Member]
Derivative [Line Items]
Notional amount			$ 750,000	$ 650,000
Derivative, maturity date	Mar. 31, 2020
Effective date	Mar. 31, 2017
Joint Venture [Member] | Interest Rate Cap Agreements [Member]
Derivative [Line Items]
Notional amount		$ 1,500,000
Derivative, maturity date	Dec. 31, 2021
Effective date	Aug. 31, 2018
Joint Venture [Member] | Interest Rate Cap Agreements [Member] | Minimum [Member]
Derivative [Line Items]
Notional amount		500,000
Joint Venture [Member] | Interest Rate Cap Agreements [Member] | Maximum [Member]
Derivative [Line Items]
Notional amount		$ 1,500,000
Variable rate		1.00%