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
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 2,150	$ 8,705
Payments and write-offs for restructuring	4,133	10,137
Balance	0	1,983	$ 3,415
Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	2,174	5,237
Payments and write-offs for restructuring	3,544	7,282
Balance	0	1,370	3,415
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other restructuring costs	(24)	3,468
Payments and write-offs for restructuring	589	2,855
Balance	$ 0	$ 613	$ 0