Restructuring Costs (Reconciliation Of Company's Liability For The Restructuring Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 2,150	$ 8,705	$ 5,356
Payments and write-offs for restructuring	4,133	10,137	2,787
Balance	0	1,983	3,415	$ 846
Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	2,174	5,237	5,356
Payments and write-offs for restructuring	3,544	7,282	2,564
Balance	0	1,370	3,415	623
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other restructuring costs	(24)	3,468	0
Payments and write-offs for restructuring	589	2,855	223
Balance	$ 0	$ 613	$ 0	$ 223