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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, 2018 | Mar. 31, 2017
Disaggregation Of Revenue [Line Items] |  |  |
Tuition |  | $ 142,196 | $ 156,133
Technology fees |  | 4,714 | 4,651
Other miscellaneous fees | [1] | 600 | 593
Total tuition and fees |  | 147,510 | 161,377
Other revenue | [2] | 555 | 732
Total revenue |  | 148,065 | 162,109
University Group [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Total revenue |  | 147,728 | 148,288
University Group [Member] | CTU [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Tuition |  | 90,734 | 90,205
Technology fees |  | 2,874 | 2,793
Other miscellaneous fees | [1] | 500 | 496
Total tuition and fees |  | 94,108 | 93,494
Other revenue | [2] | 499 | 541
Total revenue |  | 94,607 | 94,035
University Group [Member] | AIU [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Tuition |  | 51,131 | 52,219
Technology fees |  | 1,840 | 1,858
Other miscellaneous fees | [1] | 100 | 88
Total tuition and fees |  | 53,071 | 54,165
Other revenue | [2] | 50 | 88
Total revenue |  | 53,121 | 54,253
All Other Campuses [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Tuition |  | 331 | 13,709
Other miscellaneous fees | [1] |  | 9
Total tuition and fees |  | 331 | 13,718
Other revenue | [2] | 6 | 103
Total revenue |  | $ 337 | $ 13,821
[1] | Other miscellaneous fees include graduation fees, laboratory fees and activity fees.
[2] | Other revenue primarily includes contract training revenue and bookstore and laptop sales.

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