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Segment Reporting - Summary Financial Information by Reporting Segment (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |
Asset impairment charge |  | $ 33,446 | $ 237 | $ 50,837
Culinary Arts [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Asset impairment charge |  | $ 33,400 |  | $ 43,100
CTU [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Bad debt increase in percentage of revenue | 2.00% |  | 2.30% |
AIU [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Bad debt increase in percentage of revenue |  |  | 1.10% |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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