Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Total revenue		$ 710,004	$ 695,208		$ 693,034
Tuition, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	671,070	654,760		653,952
Technology and Miscellaneous Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		31,850	32,912		34,463
Tuition and Fees, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		702,920	687,672		688,415
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	7,084	7,536		4,619
University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[3],[4]	468,926	419,617		408,549
University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[5],[6]	240,300	274,479		283,360
University Group [Member] | Tuition, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[3]	443,971	396,093	[1]	384,307	[1]
University Group [Member] | Tuition, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[5]	227,099	258,667	[1]	269,645	[1]
University Group [Member] | Technology and Miscellaneous Fees [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[3]	20,849	20,270		22,476
University Group [Member] | Technology and Miscellaneous Fees [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[5]	11,001	12,642		11,987
University Group [Member] | Tuition and Fees, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[3]	464,820	416,363		406,783
University Group [Member] | Tuition and Fees, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[5]	238,100	271,309		281,632
University Group [Member] | Other [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2],[3]	4,106	3,254		1,766
University Group [Member] | Other [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2],[5]	2,200	3,170		1,728
Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		778	1,112		1,125
Corporate and Other [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	$ 778	$ 1,112		$ 1,125

[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 includes revenue related to an acquisition completed on December 1, 2022 and an acquisition completed on September 10, 2021.

[4] CTU results of operations include the Coding Dojo acquisition commencing on the December 1, 2022 date of acquisition and the Hippo acquisition commencing on the September 10, 2021 date of acquisition.

[5] AIUS includes revenue related to an acquisition completed on July 1, 2022 and an acquisition completed on August 2, 2021.

[6] AIUS results of operations include the CalSouthern acquisition commencing on the July 1, 2022 date of acquisition and the DigitalCrafts acquisition commencing on the August 2, 2021 date of acquisition.