Goodwill and Intangible Assets - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2021	Sep. 01, 2021	Aug. 10, 2021
Business Acquisition [Line Items]
Goodwill	$ 59,593,000		$ 59,593,000		$ 59,593,000
Intangible assets, net	29,025,000		29,025,000		31,539,000
Amortization	1,300,000	$ 4,000,000.0	2,500,000	$ 7,900,000
Impairment charge			0
Impairment			26,500,000		26,500,000
Impairment of goodwill and intangible assets	0	64,000,000	0	64,000,000
Accreditation, Licensing And Title IV
Business Acquisition [Line Items]
Impairment			18,500,000		18,500,000
RU Segment
Business Acquisition [Line Items]
Goodwill	33,000,000	33,000,000	33,000,000	33,000,000			$ 217,400,000
Indefinite-lived intangible assets acquired							$ 51,000,000
Intangible assets, net	24,500,000		24,500,000
Identified intangible assets	35,500,000		35,500,000
Impairment charge		53,000,000
Goodwill, impairment loss, tax effect		15,800,000
Impairment of goodwill and intangible assets		64,000,000
Fair value exceeding carrying value					$ 32,400,000
Fair value exceeding carrying value (in percent)					25.00%
RU Segment | Accreditation, Licensing And Title IV
Business Acquisition [Line Items]
Impairment		11,000,000
Fair value of intangible assets		6,000,000		6,000,000
RU Segment | Trade Name
Business Acquisition [Line Items]
Fair value of intangible assets		$ 18,500,000		$ 18,500,000
HCN Segment
Business Acquisition [Line Items]
Goodwill	26,600,000		26,600,000			$ 38,600,000
Indefinite-lived intangible assets acquired						$ 3,700,000
Identified intangible assets	4,400,000		4,400,000
Fair value exceeding carrying value					$ 7,400,000
Fair value exceeding carrying value (in percent)					21.00%
GSUSA Segment
Business Acquisition [Line Items]
Goodwill								$ 0
Intangible assets, net	0		0
Identified intangible assets	1,000,000		1,000,000
APUS Segment
Business Acquisition [Line Items]
Goodwill	0		0
Intangible assets, net	0		0
Identified intangible assets	$ 0		$ 0