Supplemental Financial Statement Information - AFS Securities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Aug. 31, 2017	Aug. 31, 2017	Nov. 30, 2016
Investments
Shares of common stock held in Centaur Media	1,952,462	1,952,462
Proceeds from sale of shares	$ 1,216	$ 1,216
Gain on sale of common stock of Centaur Media plc	$ 275	$ 275
Investment in Centaur Media
Fair Value			$ 977
Cost			1,014
Unrealized (loss)			$ (37)

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Amount of available-for-sale debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings.

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This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

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Balance held at close of period in number of shares.

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The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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