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Calculation of Earnings Per Share - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Mar. 01, 2014	Feb. 28, 2015	Mar. 01, 2014
Computation Of Earnings Per Share Line Items
Common stock options anti-dilutive	886,064	512,064	726,564	512,064
Common Stock
Computation Of Earnings Per Share Line Items
Common stock shares, authorized	17,000,000		17,000,000
Class B Common Stock
Computation Of Earnings Per Share Line Items
Common stock shares, authorized	3,000,000		3,000,000
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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