Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 217,991	$ 217,991
Amortizable Intangible Assets, Accumulated Amortization	(169,190)	(158,513)
Indefinite-lived Intangible Assets, Gross Carrying Amount	752,860	752,860
Student Relationships
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	161,900	161,900
Amortizable Intangible Assets, Accumulated Amortization	$ (145,348)	(137,476)
Amortizable Intangible Assets, Weighted Average Amortization Period	3 years
Curriculum
Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 56,091	56,091
Amortizable Intangible Assets, Accumulated Amortization	$ (23,842)	(21,037)
Amortizable Intangible Assets, Weighted Average Amortization Period	5 years
Walden trade name
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	$ 119,560	119,560
AUC trade name
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	17,100	17,100
RUSM trade name
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	3,500	3,500
RUSVM trade name
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	1,600	1,600
Chamberlain Title IV eligibility and accreditations
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	1,200	1,200
Walden Title IV eligibility and accreditations
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	495,800	495,800
AUC Title IV eligibility and accreditations
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	100,000	100,000
RUSM Title IV eligibility and accreditations
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	11,600	11,600
RUSVM Title IV eligibility and accreditations
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Gross Carrying Amount	$ 2,500	$ 2,500