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General (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Nov. 29, 2012	Nov. 24, 2011	Nov. 29, 2012	Nov. 24, 2011	Nov. 29, 2012 Fair Value, Inputs, Level 1 [Member]	May 31, 2012 Fair Value, Inputs, Level 1 [Member]
Depreciation	$ 8,533,000	$ 8,772,000	$ 16,792,000	$ 17,521,000
Percentage Of Cash Dividends			110.00%
Available-for-sale Securities, Fair Value Disclosure					78,000	78,000
Impairment of Long-Lived Assets Held-for-use	$ 417,000

X

- Definition

Percentage of cash dividends entitled to common stock holders which is calculated on total dividends declared on Class B Common Stock.

+ References

No definition available.

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X

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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