Incentive Compensation Plans (Schedule of Replacement Time-Vesting Option Activity) (Details) - Replacement Time-Vesting Options [Member] - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at April 1, 2020	3,458,744
Exercised	(778,441)
Forfeited	(196,221)
Outstanding at March 31, 2021	2,484,082	3,458,744
Exercisable at March 31, 2021	2,484,082
Weighted Average Exercise Price, Outstanding at April 1, 2020	$ 11.95
Weighted Average Exercise Price, Exercised	10.64
Weighted Average Exercise Price, Forfeited	18.67
Weighted Average Exercise Price, Outstanding at March 31, 2021	11.83	$ 11.95
Weighted Average Exercise Price, Exercisable at March 31, 2021	$ 11.83
Weighted Average Remaining Contractual Term, Outstanding	2 years 4 months 24 days	3 years 3 months 18 days
Weighted Average Remaining Contractual Term, Exercisable at March 31, 2021	2 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding at April 1, 2020	$ 4,083,000
Aggregate Intrinsic Value, Exercised	4,906,000
Aggregate Intrinsic Value, Forfeited	673,000
Aggregate Intrinsic Value, Outstanding at March 31, 2021	25,517,000	$ 4,083,000
Aggregate Intrinsic Value, Exercisable at March 31, 2021	$ 25,517,000