Supplemental Financial Statement Information - AFS Securities (Details) - USD ($) $ in Thousands	Feb. 28, 2017	Nov. 30, 2016	Feb. 29, 2016
Investments
Shares of common stock held in Centaur Media	1,952,462
Shares of Centaur Media common stock sold	0		0
Investment in Centaur Media
Fair value	$ 1,172	$ 977
Cost	1,014	1,014
Unrealized (loss)		$ (37)
Unrealized gain	$ 158

Represents the number of shares of common stock sold.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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

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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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Balance held at close of period in number of shares.

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