Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details) (USD $)
9 Months Ended
Aug. 31, 2012
Jul. 10, 2012
May 29, 2012
Feb. 03, 2012
Commitments and Contingencies (Textual) [Abstract]        
Dividends payable, amount per share   $ 0.07 $ 0.07 $ 0.07
Percentage of employees covered under collective bargaining agreement 30.00%