Supplemental Financial Statement Information (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 31, 2013	Sep. 01, 2012	Aug. 31, 2013	Sep. 01, 2012	Dec. 01, 2012
Supplemental Cash Flow Information
Increase (decrease) in value of available-for-sale securities: Investment in Centaur Media Plc			$ (535)	$ 93
Shares of Centaur Media common stock sold	1,324,688		1,324,688
Additions to real estate assets included in accounts payable and accrued liabilities			171		942
Increase (decrease) in accounts payable and accrued liabilities related to additions to real estate assets			(771)	48
Dividend payable included in accrued liabilities					1,028
Interest paid
Interest payments, net of capitalized interest	877	636	2,724	2,562
Income Taxes
Effective income tax rate (as a percent)			36.40%	46.00%
Deferred tax assets, current	39		39
Deferred tax assets, noncurrent	$ 2,345		$ 2,345