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Discontinued Operations - Combined Summary Results of Operations for Discontinued Operations (Parenthetical) (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gain on sale of business | $ 0 | $ 27,085,000 | $ 0
Income tax expense related to sale of schools |  | 300,000 |
Goodwill allocated |  | $ 20,200,000 |

X
- Definition Goodwill allocated to remainder of International reporting unit for book purposes upon sale of subsidiary. + References No definition available. + Details
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- Definition Income tax expense related to the sale of business. + References No definition available. + Details
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- Definition Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment. + References No definition available. + Details
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- Details
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