Supplemental Financial Statement Information (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Nov. 30, 2014
Supplemental Cash Flow Information
Increase in value of available-for-sale securities: Investment in Centaur Media Plc			$ 449	$ 503
Shares of Centaur Media common stock sold		500,000		500,000
Increase in accounts payable and accrued liabilities related to additions to real estate assets			2,767	$ 1,617
Interest paid
Interest payments, inclusive of capitalized interest	$ 1,053	$ 955	$ 2,049	$ 1,930
Income Taxes
Effective income tax rate (as a percent)			36.30%	40.50%
Net deferred tax asset	$ 6,428		$ 6,428		$ 5,996