Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022
Disaggregation Of Revenue [Line Items]
Total revenue		$ 179,923		$ 168,420	$ 562,085		$ 519,063
Tuition, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	170,316		158,386	530,959		488,675
Technology and Miscellaneous Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		7,943		8,051	25,139		24,985
Tuition and Fees, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		178,259		166,437	556,098		513,660
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	1,664		1,983	5,987		5,403
University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[3]	120,552	[4]	97,562	364,336	[4]	311,171
University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[5],[6]	59,226		70,582	197,128		207,034
University Group [Member] | Tuition, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	114,104	[4]	91,765	344,966	[4]	293,520
University Group [Member] | Tuition, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1],[6]	56,212		66,621	185,993		195,155
University Group [Member] | Technology and Miscellaneous Fees [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		5,269	[4]	4,826	16,112	[4]	15,371
University Group [Member] | Technology and Miscellaneous Fees [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[6]	2,674		3,225	9,027		9,614
University Group [Member] | Tuition and Fees, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		119,373	[4]	96,591	361,078	[4]	308,891
University Group [Member] | Tuition and Fees, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[6]	58,886		69,846	195,020		204,769
University Group [Member] | Other [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	1,179	[4]	971	3,258	[4]	2,280
University Group [Member] | Other [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2],[6]	340		736	2,108		2,265
Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		145		276	621		858
Corporate and Other [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	$ 145		$ 276	$ 621		$ 858

[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.

[3] CTU results of operations include the Coding Dojo acquisition commencing on the December 1, 2022 date of acquisition. Additionally, impairment of $7.4 million was recorded during the quarter ended September 30, 2023 related to certain definite-lived intangible assets.

[4] CTU includes revenue related to an acquisition completed on December 1, 2022.

[5] AIUS results of operations include the CalSouthern acquisition commencing on the July 1, 2022 date of acquisition.

[6] AIUS includes revenue related to an acquisition completed on July 1, 2022.