Goodwill and Intangible Assets (Summary of Indefinite-Lived Intangible Assets Balances by Reporting Segment) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Jun. 30, 2023
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	$ 752,860	$ 752,860
Chamberlain
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	1,200	1,200
Walden
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	615,360	615,360
Medical and Veterinary
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	$ 136,300	$ 136,300