Revenue - Narrative (Details) - USD ($)	1 Months Ended				3 Months Ended	12 Months Ended
	Oct. 31, 2024	Sep. 30, 2024	Apr. 30, 2024	Apr. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Scholarship assistance						$ 29,900,000	$ 80,700,000	$ 68,800,000
Contract assets						0	0
Deferred revenue and student deposits						23,474,000	23,830,000
APUS
Business Acquisition [Line Items]
Graduation fee per degree	$ 250	$ 150		$ 150	$ 100
Veteran Grant | APUS
Business Acquisition [Line Items]
Tuition grant, percentage funded by subsidiary				10.00%
Veteran Grant, Mater's Level | APUS
Business Acquisition [Line Items]
Tuition grant, percentage funded by subsidiary			15.00%
Veteran Grant, Opportunity Grant | APUS
Business Acquisition [Line Items]
Tuition grant, percentage funded by subsidiary			10.00%
Affordability Grant | HCN
Business Acquisition [Line Items]
Institutional affordability grant, limit to student's monthly payment						200
Institutional affordability grant, maximum award, per month						200
Institutional affordability grant, maximum award, per term						600
Future Courses
Business Acquisition [Line Items]
Deferred revenue and student deposits						23,500,000	23,800,000
Student deposit amount						9,400,000	10,000,000.0
Courses in Progress
Business Acquisition [Line Items]
Student deposit amount						14,100,000	13,800,000
HCN
Business Acquisition [Line Items]
Refund liability						$ 0	$ 0
Instructional services, net of grants and scholarships
Business Acquisition [Line Items]
Number of days of bill date to receive payment						30 days
Instructional services, net of grants and scholarships | HCN
Business Acquisition [Line Items]
Term of instruction						3 months
Instructional services, net of grants and scholarships | RU
Business Acquisition [Line Items]
Term of instruction						3 months
Instructional services, net of grants and scholarships | APUS | Minimum
Business Acquisition [Line Items]
Term of instruction						56 days
Instructional services, net of grants and scholarships | APUS | Maximum
Business Acquisition [Line Items]
Term of instruction						112 days
Textbook and other course materials | HCN
Business Acquisition [Line Items]
Number of days of bill date to receive payment						30 days