Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2023		Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Total revenue		$ 186,564		$ 167,684	$ 382,162		$ 350,643
Tuition, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	176,000		157,911	360,643		330,289
Technology and Miscellaneous Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		8,520		7,985	17,196		16,934
Tuition and Fees, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		184,520		165,896	377,839		347,223
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	2,044		1,788	4,323		3,420
University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[3]	119,292	[4]	100,461	243,784	[4]	213,609
University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[5]	67,062	[6]	66,920	137,902	[6]	136,452
University Group [Member] | Tuition, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	112,864	[4]	94,828	230,862	[4]	201,755
University Group [Member] | Tuition, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	63,136	[6]	63,083	129,781	[6]	128,534
University Group [Member] | Technology and Miscellaneous Fees [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		5,420	[4]	4,921	10,843	[4]	10,545
University Group [Member] | Technology and Miscellaneous Fees [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		3,100	[6]	3,064	6,353	[6]	6,389
University Group [Member] | Tuition and Fees, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		118,284	[4]	99,749	241,705	[4]	212,300
University Group [Member] | Tuition and Fees, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		66,236	[6]	66,147	136,134	[6]	134,923
University Group [Member] | Other [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	1,008	[4]	712	2,079	[4]	1,309
University Group [Member] | Other [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	826	[6]	773	1,768	[6]	1,529
Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		210		303	476		582
Corporate and Other [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	$ 210		$ 303	$ 476		$ 582

[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.

[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.