Incentive Compensation Plans (Schedule of Time-Vesting and Exist-Vesting Nonvested Option Activity) (Details)	12 Months Ended
	Mar. 31, 2021 $ / shares shares
Time-Vesting Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at April 1, 2020 | shares	1,988,559
Cancelled | shares	(118,428)
Vested | shares	1,232,505
Unvested at March 31, 2021 | shares	637,626
Weighted Average Grant Date Fair Value, Unvested at April 1, 2020 | $ / shares	$ 9.78
Weighted Average Grant Date Fair Value, Cancelled | $ / shares	9.78
Weighted Average Grant Date Fair Value, Vested | $ / shares	9.78
Weighted Average Grant Date Fair Value, Unvested at March 31, 2021 | $ / shares	$ 9.78
Exit-Vesting Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at April 1, 2020 | shares	5,254,104
Cancelled | shares	(503,477)
Unvested at March 31, 2021 | shares	4,750,627
Weighted Average Grant Date Fair Value, Unvested at April 1, 2020 | $ / shares	$ 5.90
Weighted Average Grant Date Fair Value, Cancelled | $ / shares	5.90
Weighted Average Grant Date Fair Value, Unvested at March 31, 2021 | $ / shares	$ 5.90