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Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  | $ 695,208 |  | $ 693,034 |  | $ 687,314
Tuition, Net [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  | 654,760 | [1] | 653,952 | [1] | 651,801
Technology Fees [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  | 31,073 |  | 32,571 |  | 30,809
Other Miscellaneous Fees [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [2] | 1,839 |  | 1,892 |  | 1,969
Tuition and Fees, Net [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  | 687,672 |  | 688,415 |  | 684,579
Other [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [3] | 7,536 |  | 4,619 |  | 2,735
University Group [Member] | CTU [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [4] | 419,617 | [5] | 408,549 | [5] | 405,507
University Group [Member] | AIUS [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [6] | 274,479 | [7] | 283,360 | [7] | 281,361
University Group [Member] | Tuition, Net [Member] | CTU [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [4] | 396,093 | [1] | 384,307 | [1] | 381,371
University Group [Member] | Tuition, Net [Member] | AIUS [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [6] | 258,667 | [1] | 269,645 | [1] | 270,430
University Group [Member] | Technology Fees [Member] | CTU [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [4] | 19,454 |  | 21,249 |  | 20,687
University Group [Member] | Technology Fees [Member] | AIUS [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [6] | 11,619 |  | 11,322 |  | 10,122
University Group [Member] | Other Miscellaneous Fees [Member] | CTU [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [2],[4] | 816 |  | 1,227 |  | 1,283
University Group [Member] | Other Miscellaneous Fees [Member] | AIUS [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [2],[6] | 1,023 |  | 665 |  | 686
University Group [Member] | Tuition and Fees, Net [Member] | CTU [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [4] | 416,363 |  | 406,783 |  | 403,341
University Group [Member] | Tuition and Fees, Net [Member] | AIUS [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [6] | 271,309 |  | 281,632 |  | 281,238
University Group [Member] | Other [Member] | CTU [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [3],[4] | 3,254 |  | 1,766 |  | 2,166
University Group [Member] | Other [Member] | AIUS [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [3],[6] | 3,170 |  | 1,728 |  | 123
Corporate and Other [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [8] | 1,112 |  | 1,125 |  | 446
Corporate and Other [Member] | Other [Member] |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Total revenue | [3],[8] | $ 1,112 |  | $ 1,125 |  | $ 446
[1] | Tuition includes revenue earned for all degree-granting programs as well as revenue earned for non-degree and professional development programs.
[2] | Other miscellaneous fees primarily include graduation fees.
[3] | Other revenue primarily includes contract training revenue and miscellaneous non-student related revenue.
[4] | CTU includes revenue related to an acquisition completed on Decem ber 1, 202 2 and an acquisition completed on September 10, 2021.
[5] | 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.
[6] | AIUS includes revenue related to an acquisition completed on July 1, 2022, an acquisition completed on August 2, 2021 and an acquisition completed on March 2, 2020.
[7] | 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.
[8] | Revenue recorded within Corporate and Other relates to miscellaneous non-student related revenue.

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