Debt Arrangements - Narrative (Details)	6 Months Ended
	Sep. 30, 2019
Debt Instrument [Line Items]
EBITDA to fixed charges ratio requirement	2.0
Senior Notes | Senior Secured First Lien Notes Due 2021
Debt Instrument [Line Items]
Stated interest rate (as a percent)	8.50%
Senior Notes | Senior Secured Second Lien Notes Due 2021
Debt Instrument [Line Items]
Stated interest rate (as a percent)	9.875%