Debt - Schedule of Detail of Interest Expense (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 18, 2019	Dec. 11, 2009	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Debt Instrument [Line Items]
Deferred payment obligation, accrued interest payment	$ 3,000	$ 22,400	$ 5,740	$ 7,993	$ 7,993
Amortization of debt issuance costs			4,688	5,052	5,361
Interest Swap Expense			2,094	(1,026)	0
Other			589	637	189
Total Interest Expense			96,960	89,517	82,269
Secured Debt | Term Loan A
Debt Instrument [Line Items]
Interest expense, debt			50,080	42,043	37,575
Secured Debt | Term Loan B
Debt Instrument [Line Items]
Interest expense, debt			15,739	16,765	14,138
Revolving Credit Facility
Debt Instrument [Line Items]
Interest expense, debt			92	115	271
Senior Notes
Debt Instrument [Line Items]
Interest expense, debt			$ 17,938	$ 17,938	$ 16,742