Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Mar. 01, 2014
Cash equivalents
Total cash equivalents	$ 34,386	$ 12,788
Available for sale securities
Total available for sale securities	10,982us-gaap_AvailableForSaleSecurities	11,477us-gaap_AvailableForSaleSecurities
Restricted investments
Total restricted investments		2,540
Mutual fund investments
Total mutual fund investments	305us-gaap_TradingSecurities	409us-gaap_TradingSecurities
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		98
Total assets at fair value	45,673us-gaap_AssetsFairValueDisclosure	27,312us-gaap_AssetsFairValueDisclosure
Money market funds
Cash equivalents
Total cash equivalents	34,386	12,788
Restricted investments
Total restricted investments		2,540
Municipal bonds
Available for sale securities
Total available for sale securities	10,982	11,477
Mutual funds
Mutual fund investments
Total mutual fund investments	305	409
Foreign Exchange Contract [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		98
Quoted Prices in Active Markets (Level 1)
Cash equivalents
Total cash equivalents	34,386	12,788
Available for sale securities
Total available for sale securities	0	0
Restricted investments
Total restricted investments		2,540
Mutual fund investments
Total mutual fund investments	305	409
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		0
Total assets at fair value	34,691	15,737
Quoted Prices in Active Markets (Level 1) \| Money market funds
Cash equivalents
Total cash equivalents	34,386	12,788
Restricted investments
Total restricted investments		2,540
Quoted Prices in Active Markets (Level 1) \| Municipal bonds
Available for sale securities
Total available for sale securities	0	0
Quoted Prices in Active Markets (Level 1) \| Mutual funds
Mutual fund investments
Total mutual fund investments	305	409
Quoted Prices in Active Markets (Level 1) \| Foreign Exchange Contract [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		0
Other Observable Inputs (Level 2)
Cash equivalents
Total cash equivalents	0	0
Available for sale securities
Total available for sale securities	10,982	11,477
Restricted investments
Total restricted investments		0
Mutual fund investments
Total mutual fund investments	0	0
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		98
Total assets at fair value	10,982	11,575
Other Observable Inputs (Level 2) \| Money market funds
Cash equivalents
Total cash equivalents	0	0
Restricted investments
Total restricted investments		0
Other Observable Inputs (Level 2) \| Municipal bonds
Available for sale securities
Total available for sale securities	10,982	11,477
Other Observable Inputs (Level 2) \| Mutual funds
Mutual fund investments
Total mutual fund investments	0	0
Other Observable Inputs (Level 2) \| Foreign Exchange Contract [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		$ 98

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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-Publisher FASB

-Name Accounting Standards Codification

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+ References

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

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No definition available.

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The aggregate value of all restricted investments.

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Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.

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-Topic 942

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