Goodwill and Intangible Assets (Summary of Indefinite-Lived Intangible Assets Balances by Reporting Segment) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	$ 752,860	$ 752,860	$ 752,860
Chamberlain
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	1,200	1,200	1,200
Walden University
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	615,360	615,360	615,360
Medical and Veterinary
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	$ 136,300	$ 136,300	$ 136,300