Fair Value Measurements (Tables)

6 Months Ended

Sep. 30, 2021

Fair Value Measurements [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

			Quoted in		Significant Other		Significant
			Identical Markets		Observable Inputs		Unobservable Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Balance at September 30, 2021:
Interest rate cap agreements	$	(8,711)	$	—	$	(8,711)	$	—
Total	$	(8,711)	$	—	$	(8,711)	$	—
Balance at March 31, 2021:
Interest rate cap agreements	$	(22,725)	$	—	$	(22,725)	$	—
Total	$	(22,725)	$	—	$	(22,725)	$	—

Reconciliation of Fair Value Derivative Using Unobservable Inputs

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Balance at beginning of period	$	—	$	(550)	$	—	$	(3,000)
Gain (loss) included in Other, net		—		550		—		3,000
Balance at end of period	$	—	$	—	$	—	$	—

Carrying Amount and Estimated Fair Value of Financial Instruments

	September 30, 2021				March 31, 2021
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Cash and cash equivalents	$	80,414	$	80,414	$	113,101	$	113,101
Senior Credit Facilities (Level 2)	$	3,321,963	$	3,389,178	$	3,405,552	$	3,488,883
Senior Notes (Level 2)	$	1,318,876	$	1,338,250	$	1,318,079	$	1,351,500
Debt component of tangible equity units (Level 2)	$	12,470	$	12,896	$	20,345	$	21,435