Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Disaggregation Of Revenue [Line Items]
Total revenue		$ 168,264	$ 195,598
Tuition, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	159,269	184,643
Technology and Other Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		7,729	8,676
Tuition and Fees, Net [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		166,998	193,319
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	1,266	2,279
University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		113,569	124,492
University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		54,505	70,840
University Group [Member] | Tuition, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	107,440	117,998
University Group [Member] | Tuition, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[1]	51,829	66,645
University Group [Member] | Technology and Other Fees [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		5,340	5,423
University Group [Member] | Technology and Other Fees [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		2,389	3,253
University Group [Member] | Tuition and Fees, Net [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		112,780	123,421
University Group [Member] | Tuition and Fees, Net [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		54,218	69,898
University Group [Member] | Other [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	789	1,071
University Group [Member] | Other [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	287	942
Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		190	266
Corporate and Other [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	$ 190	$ 266

[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.