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Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | $ 170,994 |  | $ 157,853
University Group [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 170,984 |  | 157,836
University Group [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 103,588 |  | 97,057
University Group [Member] | AIU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [2] | 67,396 | [1] | 60,779
Corporate and Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [3],[4] | 10 |  | 17
Tuition [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 162,096 |  | 150,848
Tuition [Member] | University Group [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 97,551 |  | 92,618
Tuition [Member] | University Group [Member] | AIU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 64,545 | [1] | 58,230
Technology Fees [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 7,777 |  | 5,827
Technology Fees [Member] | University Group [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 5,120 |  | 3,449
Technology Fees [Member] | University Group [Member] | AIU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 2,657 | [1] | 2,378
Other Miscellaneous Fees [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [5] | 521 |  | 553
Other Miscellaneous Fees [Member] | University Group [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [5] | 372 |  | 424
Other Miscellaneous Fees [Member] | University Group [Member] | AIU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [5] | 149 | [1] | 129
Tuition and Fees [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 170,394 |  | 157,228
Tuition and Fees [Member] | University Group [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 103,043 |  | 96,491
Tuition and Fees [Member] | University Group [Member] | AIU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 67,351 | [1] | 60,737
Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [6] | 600 |  | 625
Other [Member] | University Group [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [6] | 545 |  | 566
Other [Member] | University Group [Member] | AIU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [6] | 45 | [1] | 42
Other [Member] | Corporate and Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [4],[6] | $ 10 |  | $ 17
[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 March 31, 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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