Incentive Compensation Plans (Schedule of Replacement Time-Vesting Option Activity) (Details) - Replacement Time-Vesting Options [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at April 1, 2019	4,529,291
Exercised	(708,969)
Forfeited	(361,578)
Outstanding at March 31, 2020	3,458,744	4,529,291
Exercisable at March 31, 2020	3,458,744
Weighted Average Exercise Price, Outstanding at April 1, 2019	$ 11.76
Weighted Average Exercise Price, Exercised	15.66
Weighted Average Exercise Price, Outstanding at March 31, 2020	11.95	$ 11.76
Weighted Average Exercise Price, Exercisable at March 31, 2020	$ 11.95
Weighted Average Remaining Contractual Term, Outstanding	3 years 3 months 18 days	4 years 4 months 24 days
Weighted Average Remaining Contractual Term, Exercisable at March 31, 2020	3 years 3 months 18 days
Aggregate Intrinsic Value, Outstanding at April 1, 2019	$ 39,896
Aggregate Intrinsic Value, Exercised	5,077
Aggregate Intrinsic Value, Forfeited	74
Aggregate Intrinsic Value, Outstanding at March 31, 2020	4,083	$ 39,896
Aggregate Intrinsic Value, Exercisable at March 31, 2020	$ 4,083