Business Acquisition - Summary of Final Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 01, 2011 Everblue [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Receivables		$ 1,185
Other current assets		285
Property and equipment		147
Goodwill	2,900	8,853
Total assets acquired		10,470
Deferred tuition revenue		681
Total liabilities assumed		681
Net assets acquired		$ 9,789

The amount of acquisition cost of a business combination allocated to other current assets.

No definition available.

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The amount of acquisition cost of a business combination allocated to assets acquired.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

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The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The amount of acquisition cost of a business combination allocated to receivables.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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The amount of acquisition cost of a business combination allocated to deferred revenue of the acquired entity.

+ References

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-Publisher FASB

-Name Emerging Issues Task Force (EITF)

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- Definition

Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The amount of acquisition cost of a business combination allocated to liabilities assumed.

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-Name Emerging Issues Task Force (EITF)

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The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

+ References

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