Goodwill and Intangible Assets (Summary of Indefinite-Lived Intangible Assets Balances by Reporting Segment) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	$ 839,072	$ 223,712	$ 224,935
Chamberlain University Segment [Member]
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
Medical and Veterinary [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	136,300	136,300	136,300
Financial Service [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets balances	$ 86,212	$ 86,212	$ 87,435