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Note 5 - Unconsolidated Affiliated Companies (Details) - Income from Zenith (Earnings Recognized [Member], Zenith Freight Lines [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2014	Jun. 01, 2013	May 31, 2014	Jun. 01, 2013
Earnings Recognized [Member] \| Zenith Freight Lines [Member]
Schedule of Equity Method Investments [Line Items]
Earnings recognized	$ 278	$ 168	$ 343	$ 282

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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