Net Income (Loss) Per Share (Antidilutive Securities Excluded from Diluted Net Income (Loss) Per Share) (Details) - shares	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Purchase Contracts [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted net income (loss) per share	1,829,437
Time-Vesting Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted net income (loss) per share	1,259,594	1,869,456	4,570,624
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted net income (loss) per share	1,345,211
Deferred Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted net income (loss) per share	20,371