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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, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | $ 175,539 | $ 176,035 | $ 359,177 |  | $ 347,029 |
University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 102,035 | 100,193 | 207,857 |  | 203,781 |
University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 73,223 | 75,835 | 150,700 | [1] | 143,231 | [1]
Corporate and Other [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [2],[3] | 281 | 7 | 620 |  | 17 |
Tuition [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 165,846 | 167,208 | 339,949 |  | 329,304 |
Tuition [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 95,723 | 94,204 | 195,328 |  | 191,755 |
Tuition [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 70,123 | 73,004 | 144,621 |  | 137,549 |
Technology Fees [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 8,403 | 7,795 | 16,681 |  | 15,572 |
Technology Fees [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 5,530 | 5,162 | 11,013 |  | 10,282 |
Technology Fees [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 2,873 | 2,633 | 5,668 |  | 5,290 |
Other Miscellaneous Fees [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [4] | 555 | 496 | 1,005 |  | 1,017 |
Other Miscellaneous Fees [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [4] | 389 | 323 | 681 |  | 695 |
Other Miscellaneous Fees [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [4] | 166 | 173 | 324 |  | 322 |
Tuition and Fees [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 174,804 | 175,499 | 357,635 |  | 345,893 |
Tuition and Fees [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 101,642 | 99,689 | 207,022 |  | 202,732 |
Tuition and Fees [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue |  | 73,162 | 75,810 | 150,613 |  | 143,161 |
Other [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [5] | 735 | 536 | 1,542 |  | 1,136 |
Other [Member] | University Group [Member] | CTU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [5] | 393 | 504 | 835 |  | 1,049 |
Other [Member] | University Group [Member] | AIU [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [5] | 61 | 25 | 87 |  | 70 |
Other [Member] | Corporate and Other [Member] |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |
Total revenue | [3],[5] | $ 281 | $ 7 | $ 620 |  | $ 17 |
[1] | AIU’s revenue and operating income for the year to date ended June 30, 2020, include results of operations related to Trident from the March 2, 2020 date of acquisition and therefore do not reflect a full period of activity for Trident.
[2] | Corporate and Other includes results of operations and total assets for closed campuses.
[3] | Revenue recorded within Corporate and Other relates to miscellaneous non-student related revenue.
[4] | Other miscellaneous fees include student activity fees and graduation fees.
[5] | Other revenue primarily includes contract training revenue and miscellaneous non-student related revenue.

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