Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total Revenue	$ 149,608	$ 78,014	$ 304,355	$ 166,555
Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	136,716	75,853	277,968	162,036
Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	380	272	715	645
Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	11,421	1,614	23,378	3,245
Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	1,091	275	2,294	629
Corporate and Other
Disaggregation of Revenue [Line Items]
Total Revenue	4,327	(59)	7,344	(126)
Corporate and Other | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	4,327	(59)	7,344	(126)
Corporate and Other | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	0	0	0	0
Corporate and Other | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	0	0	0	0
Corporate and Other | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	0	0	0	0
APUS | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue	69,904	66,939	142,994	144,415
APUS | Operating Segments | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	69,336	66,521	141,921	143,406
APUS | Operating Segments | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	380	272	715	645
APUS | Operating Segments | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	0	0	0	0
APUS | Operating Segments | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	188	146	358	364
RU | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue	63,891	0	130,990	0
RU | Operating Segments | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	53,323	0	109,240	0
RU | Operating Segments | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	0	0	0	0
RU | Operating Segments | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	9,798	0	20,092	0
RU | Operating Segments | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	770	0	1,658	0
HCN | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue	11,486	11,134	23,027	22,266
HCN | Operating Segments | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	9,730	9,391	19,463	18,756
HCN | Operating Segments | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	0	0	0	0
HCN | Operating Segments | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	1,623	1,614	3,286	3,245
HCN | Operating Segments | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	$ 133	$ 129	$ 278	$ 265