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Acquisition (Details) (USD $) |  |  | 0 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 27, 2011 Certain assets of Jack Welch Management Institute [Member] | Dec. 31, 2013 Certain assets of Jack Welch Management Institute [Member]
Business Acquisition [Line Items] |  |  |  |
Purchase price paid for acquisition of certain assets of the Jack Welch Management Institute |  |  | $ 7,000,000 |
Cash received form Mr. Welch representing his economic interest in JWMI |  |  | 2,800,000 |
Deferred payments to the sellers |  |  |  | 2,100,000
Value of acquired course content |  |  | 800,000 |
Estimated useful life of course content |  |  | 5 years |
Acquired indefinite-lived intangible assets |  |  | 1,600,000 |
Goodwill | $ 6,800,000 | $ 6,800,000 | $ 6,800,000 |

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