Supplemental Financial Statement Information (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014
Supplemental Cash Flow Information
Increase in value of available-for-sale securities: Investment in Centaur Media Plc			$ 638	$ 277
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			1,256	$ 20
Interest paid
Interest payments, inclusive of capitalized interest	$ 1,070	$ 963	$ 3,119	$ 2,893
Income Taxes
Effective income tax rate (as a percent)			28.90%	39.50%
Net deferred tax asset	$ 5,640		$ 5,640