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Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2019 | Sep. 30, 2019 | [1] | Jun. 30, 2019 | [2] | Mar. 31, 2019 | Dec. 31, 2018 | [3] | Sep. 30, 2018 | Jun. 30, 2018 | [4] | Mar. 31, 2018 | [5] | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  | $ 158,451 | $ 154,959 | $ 156,441 | $ 157,853 | $ 145,505 | $ 145,690 | $ 142,036 | $ 148,065 | $ 627,704 | [6] | $ 581,296 | [6] | $ 596,435 | [6]
Tuition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 595,682 |  | 557,191 |  | 573,445 |
Technology Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 27,256 |  | 19,150 |  | 17,966 |
Other Miscellaneous Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [7] |  |  |  |  |  |  |  |  | 2,118 |  | 2,204 |  | 2,438 |
Tuition and Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 625,056 |  | 578,545 |  | 593,849 |
Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [8] |  |  |  |  |  |  |  |  | 2,648 |  | 2,751 |  | 2,586 |
University Group [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [6] |  |  |  |  |  |  |  |  | 627,637 |  | 580,690 |  | 569,576 |
University Group [Member] | CTU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [6] |  |  |  |  |  |  |  |  | 392,263 | [9] | 375,770 |  | 371,325 |
University Group [Member] | AIU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [6] |  |  |  |  |  |  |  |  | 235,374 | [10] | 204,920 |  | 198,251 |
University Group [Member] | Tuition [Member] | CTU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 370,318 |  | 359,929 |  | 356,091 |
University Group [Member] | Tuition [Member] | AIU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 225,364 |  | 196,712 |  | 190,739 |
University Group [Member] | Technology Fees [Member] | CTU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 17,844 |  | 11,560 |  | 11,175 |
University Group [Member] | Technology Fees [Member] | AIU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 9,412 |  | 7,590 |  | 6,791 |
University Group [Member] | Other Miscellaneous Fees [Member] | CTU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [7] |  |  |  |  |  |  |  |  | 1,690 |  | 1,769 |  | 1,964 |
University Group [Member] | Other Miscellaneous Fees [Member] | AIU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [7] |  |  |  |  |  |  |  |  | 428 |  | 416 |  | 451 |
University Group [Member] | Tuition and Fees [Member] | CTU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 389,852 |  | 373,258 |  | 369,230 |
University Group [Member] | Tuition and Fees [Member] | AIU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 235,204 |  | 204,718 |  | 197,981 |
University Group [Member] | Other [Member] | CTU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [8] |  |  |  |  |  |  |  |  | 2,411 |  | 2,512 |  | 2,095 |
University Group [Member] | Other [Member] | AIU [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [8] |  |  |  |  |  |  |  |  | 170 |  | 202 |  | 270 |
Corporate and Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [6],[11],[13] |  |  |  |  |  |  |  |  | 67 | [12] | 606 | [14] | 26,859 | [15]
Corporate and Other [Member] | Tuition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [13] |  |  |  |  |  |  |  |  |  |  | 550 |  | 26,615 |
Corporate and Other [Member] | Other Miscellaneous Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [7],[13] |  |  |  |  |  |  |  |  |  |  | 19 |  | 23 |
Corporate and Other [Member] | Tuition and Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [13] |  |  |  |  |  |  |  |  |  |  | 569 |  | 26,638 |
Corporate and Other [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | [8],[13] |  |  |  |  |  |  |  |  | $ 67 |  | $ 37 |  | $ 221 |
[1] | Third quarter of 2019 net income included a $7.1 million significant legal settlement for the Oregon arbitrations matter.
[2] | Second quarter of 2019 net income included a $30.0 million significant legal settlement for the FTC matter, of which $23.3 million was non-deductible for income tax purposes during the second quarter of 2019.
[3] | Fourth quarter of 2018 net income included a $5.0 million significant legal settlement for the multi-state AG matter.
[4] | Second quarter of 2018 net income included a $6.0 million significant legal settlement for the Surrett matter.
[5] | First quarter of 2018 net income included a $3.5 million significant legal settlement for the Surrett matter.
[6] | The statement of income (loss) and comprehensive income (loss) balances including revenue, operating income (loss), depreciation and amortization and capital expenditures are presented above on a continuing operations basis. Total assets are presented on a consolidated basis including continuing and discontinued operations and do not include intercompany receivable or payable activity between institutions and corporate and investments in subsidiaries.
[7] | Other miscellaneous fees include student activity fees and graduation fees.
[8] | Other revenue primarily includes contract training revenue and bookstore sales.
[9] | CTU: a $18.6 million charge related to the FTC settlement.
[10] | AIU: a $11.4 million charge related to the FTC settlement.
[11] | Corporate and Other includes results of operations for closed campuses.
[12] | Corporate and Other: a charge of $7.1 million for the Oregon arbitrations matter related to previously closed campuses.
[13] | Revenue recorded within Corporate and Other relates to certain bookstore sales for the year ended December 31, 2019 and to closed campuses which are now reported within this category for the years ended December 31, 2018 and 2017.
[14] | Corporate and Other: $14.6 million of charges related to significant legal settlements for the Surrett and multi-state AG matters and $9.4 million of charges related to remaining lease obligations of vacated space.
[15] | Corporate and Other: $6.5 million charge related to a significant legal settlement for the Surrett matter and $14.8 million of charges related to remaining lease obligations of vacated space.

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