Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022		Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Total revenue		$ 182,959		$ 183,638
University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[2]	113,148	[1]	105,822
University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[4]	69,532	[3]	77,477
Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[5],[6]	279		339
Tuition [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[7]	172,378		174,103
Tuition [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[7]	106,927	[1]	99,605
Tuition [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[7]	65,451	[3]	74,498
Technology Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		8,552		8,278
Technology Fees [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		5,442	[1]	5,483
Technology Fees [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		3,110	[3]	2,795
Other Miscellaneous Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[8]	397		450
Other Miscellaneous Fees [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[8]	182	[1]	292
Other Miscellaneous Fees [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[8]	215	[3]	158
Tuition and Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		181,327		182,831
Tuition and Fees [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		112,551	[1]	105,380
Tuition and Fees [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue		68,776	[3]	77,451
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[9]	1,632		807
Other [Member] | University Group [Member] | CTU [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[9]	597	[1]	442
Other [Member] | University Group [Member] | AIUS [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[9]	756	[3]	26
Other [Member] | Corporate and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	[6],[9]	$ 279		$ 339

[1] CTU includes revenue related to the Hippo acquisition commencing on the September 10, 2021 date of acquisition.

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

[3] AIUS includes revenue related to the DigitalCrafts acquisition commencing on the August 2, 2021 date of acquisition.

[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 related to the DigitalCrafts and Hippo acquisitions from the date of acquisitions

[8] Other miscellaneous fees primarily include graduation fees.

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