Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023		Mar. 31, 2022
Disaggregation Of Revenue [Line Items]
Total revenue		$ 195,598		$ 182,959
Tuition, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	184,643		172,378
Technology and Miscellaneous Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		8,676		8,949
Tuition and Fees, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		193,319		181,327
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	2,279		1,632
University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[3]	124,492	[4]	113,148
University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[5],[6]	70,840		69,532
University Group [Member] | Tuition, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	117,998	[4]	106,927
University Group [Member] | Tuition, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	66,645	[6]	65,451
University Group [Member] | Technology and Miscellaneous Fees [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		5,423	[4]	5,624
University Group [Member] | Technology and Miscellaneous Fees [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		3,253	[6]	3,325
University Group [Member] | Tuition and Fees, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		123,421	[4]	112,551
University Group [Member] | Tuition and Fees, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		69,898	[6]	68,776
University Group [Member] | Other [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	1,071	[4]	597
University Group [Member] | Other [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	942	[6]	756
Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		266		279
Corporate and Other [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	$ 266		$ 279

[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.