Acquisition (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 27, 2011
Acquisition (Textual)
Purchase price paid for acquisition of certain assets of the Jack Welch Management Institute		$ 7.0
Cash received form Mr. Welch representing his economic interest in JWMI		2.8
Deferred payments to the sellers	2.1
Value of acquired course content		0.8
Estimated useful life of course content	5 years
Acquired indefinite-lived intangible assets	1.6
Goodwill	$ 6.8

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Business acquisition purchase price allocation current liabilities deferred payments.

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No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The aggregate cost of a major indefinite-lived intangible asset class acquired, during the period, either individually or as part of a group of assets (in either an asset acquisition or business combination).

+ References

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

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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- Definition

The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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The amount of cash and cash equivalents acquired in a business combination.

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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.

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

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