Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2022		Jun. 30, 2021	Jun. 30, 2022		Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenue		$ 167,684		$ 175,539	$ 350,643		$ 359,177
University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	100,461	[1]	102,035	213,609	[1]	207,857
University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[4]	66,920	[3]	73,223	136,452	[3]	150,700
Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[5],[6]	303		281	582		620
Tuition [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[7]	157,911		165,846	330,289		339,949
Tuition [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[7]	94,828	[1]	95,723	201,755	[1]	195,328
Tuition [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[7]	63,083	[3]	70,123	128,534	[3]	144,621
Technology Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		7,587		8,403	16,139		16,681
Technology Fees [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		4,658	[1]	5,530	10,100	[1]	11,013
Technology Fees [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		2,929	[3]	2,873	6,039	[3]	5,668
Other Miscellaneous Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[8]	398		555	795		1,005
Other Miscellaneous Fees [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[8]	263	[1]	389	445	[1]	681
Other Miscellaneous Fees [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[8]	135	[3]	166	350	[3]	324
Tuition and Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		165,896		174,804	347,223		357,635
Tuition and Fees [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		99,749	[1]	101,642	212,300	[1]	207,022
Tuition and Fees [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		66,147	[3]	73,162	134,923	[3]	150,613
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[9]	1,788		735	3,420		1,542
Other [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[9]	712	[1]	393	1,309	[1]	835
Other [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[9]	773	[3]	61	1,529	[3]	87
Other [Member] | Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[6],[9]	$ 303		$ 281	$ 582		$ 620

[1] CTU includes revenue related to an acquisition completed on September 10, 2021.

[2] CTU results of operations include the Hippo acquisition commencing on the September 10, 2021 date of acquisition.

[3] AIUS includes revenue related to an acquisition completed on August 2, 2021.

[4] AIUS results of operations include the DigitalCrafts acquisition commencing on the August 2, 2021 date of acquisition.

[5] Corporate and Other includes results of operations and total assets for closed campuses. Revenue recorded within Corporate and Other relates to miscellaneous non-student related revenue.

[6] Revenue recorded within Corporate and Other relates to miscellaneous non-student related revenue.

[7] Tuition includes revenue earned for degree-granting programs as well as revenue earned for non-degree professional development and continuing education offerings

[8] Other miscellaneous fees primarily include graduation fees.

[9] Other revenue primarily includes contract training revenue and miscellaneous non-student related revenue.