Fair Value Measurements (Details Textual) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Mar. 02, 2013
Fair Value Disclosures [Abstract]
Short-term available for sale securities	$ 15,227	$ 26,007
Available-for-sale Securities, Debt Securities, Noncurrent	11,044	12,807
Restricted short-term investments	2,800	21,804
Restricted Cash and Cash Equivalents, Noncurrent	3,790	4,639
Mutual fund investments	$ 700

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

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+ Details

- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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