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Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | $ 176,035 |  | $ 156,441 | $ 347,029 |  | $ 314,294
University Group [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 176,028 |  | 156,428 | 347,012 |  | 314,264
University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 100,193 |  | 96,555 | 203,781 |  | 193,612
University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [2] | 75,835 | [1] | 59,873 | 143,231 | [1] | 120,652
Corporate and Other [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [3],[4] | 7 |  | 13 | 17 |  | 30
Tuition [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 167,208 |  | 148,244 | 329,304 |  | 299,092
Tuition [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 94,204 |  | 90,903 | 191,755 |  | 183,521
Tuition [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 73,004 | [1] | 57,341 | 137,549 | [1] | 115,571
Technology Fees [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 7,795 |  | 6,981 | 15,572 |  | 12,808
Technology Fees [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 5,162 |  | 4,590 | 10,282 |  | 8,039
Technology Fees [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 2,633 | [1] | 2,391 | 5,290 | [1] | 4,769
Other Miscellaneous Fees [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [5] | 496 |  | 554 | 1,017 |  | 1,107
Other Miscellaneous Fees [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [5] | 323 |  | 463 | 695 |  | 887
Other Miscellaneous Fees [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [5] | 173 | [1] | 91 | 322 | [1] | 220
Tuition and Fees [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 175,499 |  | 155,779 | 345,893 |  | 313,007
Tuition and Fees [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 99,689 |  | 95,956 | 202,732 |  | 192,447
Tuition and Fees [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 75,810 | [1] | 59,823 | 143,161 | [1] | 120,560
Other [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [6] | 536 |  | 662 | 1,136 |  | 1,287
Other [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [6] | 504 |  | 599 | 1,049 |  | 1,165
Other [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [6] | 25 | [1] | 50 | 70 | [1] | 92
Other [Member] | Corporate and Other [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [4],[6] | $ 7 |  | $ 13 | $ 17 |  | $ 30
[1] | AIU includes revenue related to the Trident acquisition commencing on the March 2, 2020 date of acquisition.
[2] | AIU results of operations and total assets include the Trident acquisition commencing on the March 2, 2020 date of acquisition and as of June 30, 2020.
[3] | Corporate and Other includes results of operations and total assets for closed campuses.
[4] | Revenue recorded within Corporate and Other relates to certain bookstore sales and closed campuses which are now reported within this category.
[5] | Other miscellaneous fees include student activity fees and graduation fees.
[6] | Other revenue primarily includes contract training revenue and bookstore sales.

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