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Calculation of Earnings Per Share - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Nov. 30, 2013	Dec. 01, 2012	Nov. 30, 2013	Dec. 01, 2012
Computation Of Earnings Per Share Line Items
Preferred stock shares, authorized	5,000,000		5,000,000
Common stock options anti-dilutive	512,064	477,064	487,064	267,564
Common Stock
Computation Of Earnings Per Share Line Items
Common stock shares, authorized	30,000,000		30,000,000
Class B Common Stock
Computation Of Earnings Per Share Line Items
Common stock shares, authorized	10,000,000		10,000,000
Number of votes for Class B common stock			10
Cash dividends Class A common stock			90.00%

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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