Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation Of Revenue [Line Items]
Total revenue		$ 169,828	$ 179,923	$ 504,832	$ 562,085
Tuition, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	160,904	170,316	478,117	530,959
Technology and Other Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		7,538	7,943	22,727	25,139
Tuition and Fees, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		168,442	178,259	500,844	556,098
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	1,386	1,664	3,988	5,987
University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		115,742	120,552	342,139	364,336
University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		53,887	59,226	162,114	197,128
University Group [Member] | Tuition, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	109,730	114,104	324,148	344,966
University Group [Member] | Tuition, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	51,174	56,212	153,969	185,993
University Group [Member] | Technology and Other Fees [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		5,107	5,269	15,445	16,112
University Group [Member] | Technology and Other Fees [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		2,431	2,674	7,282	9,027
University Group [Member] | Tuition and Fees, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		114,837	119,373	339,593	361,078
University Group [Member] | Tuition and Fees, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		53,605	58,886	161,251	195,020
University Group [Member] | Other [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	905	1,179	2,546	3,258
University Group [Member] | Other [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	282	340	863	2,108
Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		199	145	579	621
Corporate and Other [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	$ 199	$ 145	$ 579	$ 621

[1] Tuition includes revenue earned for all degree-granting programs as well as revenue earned for non-degree and professional development programs.

[2] Other revenue primarily includes contract training revenue and miscellaneous non-student related revenue.