Supplemental Financial Statement Information (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	May 31, 2014	Jun. 01, 2013	May 31, 2014	Jun. 01, 2013	Nov. 30, 2013	Feb. 28, 2014
Supplemental Cash Flow Information
Increase (decrease) in value of available-for-sale securities: Investment in Centaur Media Plc			$ 503	$ (1,034)
Shares of Centaur Media common stock sold	500,000		500,000
Additions to real estate assets included in accounts payable and accrued liabilities			2,430		813
Increase (decrease) in accounts payable and accrued liabilities related to additions to real estate assets			1,617	(221)
Interest paid
Interest payments	955	658	1,930	1,847
Liability for postretirement benefit					372	63
Curtailment gain included in the determination of the loss on the Imperial Sale			309
Income Taxes
Effective income tax rate (as a percent)			40.50%	33.00%
Net deferred tax asset	$ 6,927		$ 6,927		$ 5,975