Marketable Securities (Details Textual) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Mar. 02, 2013
Marketable Securities (Textual) [Abstract]
Investments, Total	$ 26,300
Short-term available for sale securities	15,227	26,007
Available-for-sale Securities, Debt Securities, Noncurrent	11,044	12,807
Prism Assurance Ltd [Member]
Marketable Securities (Textual) [Abstract]
Investments, Total	$ 11,100

Total of debt securities categorized neither as held-to-maturity nor trading which are intended be sold or mature within one year from the balance sheet date or the normal operating cycle, whichever is longer.

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+ Details

- Definition

Total of debt securities categorized neither as held-to-maturity nor trading which are intended be sold or mature more than one year from the balance sheet date or operating cycle, if longer.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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+ Details

- Definition

Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

+ References+ Details