Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total Revenue	$ 164,110	$ 153,122	$ 152,895	$ 154,432	$ 152,804	$ 150,838	$ 147,214	$ 149,689	$ 624,559	$ 600,545	$ 606,328
Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue									575,687	554,711	554,702
Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue									2,454	1,764	1,348
Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue									42,228	40,263	45,704
Other fees
Disaggregation of Revenue [Line Items]
Total Revenue									4,190	3,807	4,574
Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue									600,601	574,325	585,463
Corporate and Other
Disaggregation of Revenue [Line Items]
Total Revenue									23,958	26,220	20,865
Corporate and Other | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue									23,958	26,220	20,865
Corporate and Other | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue									0	0	0
Corporate and Other | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue									0	0	0
Corporate and Other | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue									0	0	0
APUS | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue									317,049	303,303	285,128
APUS | Operating Segments | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue									313,924	300,794	283,079
APUS | Operating Segments | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue									2,454	1,764	1,348
APUS | Operating Segments | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue									0	0	0
APUS | Operating Segments | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue									671	745	701
RU | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue									216,262	214,086	253,257
RU | Operating Segments | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue									181,975	179,699	211,253
RU | Operating Segments | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue									0	0	0
RU | Operating Segments | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue									32,041	32,008	38,740
RU | Operating Segments | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue									2,246	2,379	3,264
HCN | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue									67,290	56,936	47,078
HCN | Operating Segments | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue									55,830	47,998	39,505
HCN | Operating Segments | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue									0	0	0
HCN | Operating Segments | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue									10,187	8,255	6,964
HCN | Operating Segments | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue									$ 1,273	$ 683	$ 609