Segment Information - Summary of Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Revenue	$ 163,215	$ 153,122	$ 490,532	$ 460,449
Instructional costs and services	74,698	75,401	228,065	224,042
Selling and promotional	36,139	33,459	106,392	99,753
General and administrative	34,689	35,030	109,243	105,733
Income from operations before interest and income taxes	9,697	4,129	28,968	11,531
Operating Segments
Segment Reporting Information [Line Items]
Revenue	162,407	145,078	482,666	441,807
Income from operations before interest and income taxes	23,167	12,385	65,539	34,923
Operating Segments | APUS Segment
Segment Reporting Information [Line Items]
Revenue	83,137	76,981	248,814	234,685
Instructional costs and services	26,087	25,353	81,916	78,668
Selling and promotional	16,809	14,882	48,455	45,309
General and administrative	13,954	14,765	42,996	44,843
Other	1,007	1,216	4,599	3,722
Income from operations before interest and income taxes	25,280	20,765	70,848	62,143
Operating Segments | RU Segment
Segment Reporting Information [Line Items]
Revenue	60,830	52,604	179,602	158,773
Instructional costs and services	35,923	34,814	104,427	101,292
Selling and promotional	16,715	15,846	49,517	47,180
General and administrative	7,266	6,462	22,291	22,120
Other	2,166	3,091	6,655	13,582
Income from operations before interest and income taxes	(1,240)	(7,609)	(3,288)	(25,401)
Operating Segments | HCN
Segment Reporting Information [Line Items]
Revenue	18,440	15,493	54,250	48,349
Instructional costs and services	11,762	11,100	34,645	32,929
Selling and promotional	2,236	1,471	5,914	3,731
General and administrative	4,778	3,182	14,137	12,310
Other	537	511	1,575	1,198
Income from operations before interest and income taxes	(873)	(771)	(2,021)	(1,819)
Corporate and Other
Segment Reporting Information [Line Items]
Revenue	808	8,044	7,866	18,642
Instructional costs and services	926	4,134	7,077	11,153
Selling and promotional	379	1,260	2,506	3,533
General and administrative	8,691	10,623	29,819	26,462
Other	4,282	283	5,035	886
Income from operations before interest and income taxes	$ (13,470)	$ (8,256)	$ (36,571)	$ (23,392)