Goodwill And Intangible Assets (Schedule Of Goodwill) (Details) - USD ($) $ in Thousands	2 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Goodwill [Roll Forward]
Goodwill before impairment losses, beginning balance	$ 895,956	$ 892,818	$ 850,435	$ 552,234
Accumulated impairment losses, beginning balance	(138,297)	(138,297)	(138,297)	(32,297)
Goodwill, beginning balance	757,659	754,521	712,138	519,937
Disposals and foreign currency changes, net	(3,304)	(12,816)	38,573	(26,154)
Impairments	0	0	0	(106,000)
Goodwill before impairment losses, ending balance	892,818	898,698	895,956	850,435
Accumulated impairment losses, ending balance	(138,297)	(138,297)	(138,297)	(138,297)
Goodwill, ending balance	754,521	760,401	757,659	712,138
Wave HQ Inc.
Goodwill [Roll Forward]
Acquisitions				300,560
Goodwill, ending balance		300,560
Acquisitions
Goodwill [Roll Forward]
Acquisitions	$ 166	$ 18,696	$ 6,948	$ 23,795