Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2014	Mar. 01, 2014
Cash equivalents
Total cash equivalents	$ 8,242	$ 12,788
Available for sale securities
Available-for-sale Securities	10,798	11,477
Restricted investments
Total restricted investments	1,742	2,540
Mutual fund investments
Total mutual fund investments	807	409
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		98
Total assets at fair value	21,589	27,312
Money market funds [Member]
Cash equivalents
Total cash equivalents	8,242	12,788
Restricted investments
Total restricted investments	1,742	2,540
Municipal bonds [Member]
Available for sale securities
Available-for-sale Securities	10,798	11,477
Mutual funds [Member]
Mutual fund investments
Total mutual fund investments	807	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) [Member]
Cash equivalents
Total cash equivalents	8,242	12,788
Available for sale securities
Available-for-sale Securities	0	0
Restricted investments
Total restricted investments	1,742	2,540
Mutual fund investments
Total mutual fund investments	807	409
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		0
Total assets at fair value	10,791	15,737
Quoted Prices in Active Markets (Level 1) [Member] | Money market funds [Member]
Cash equivalents
Total cash equivalents	8,242	12,788
Restricted investments
Total restricted investments	1,742	2,540
Quoted Prices in Active Markets (Level 1) [Member] | Municipal bonds [Member]
Available for sale securities
Available-for-sale Securities	0	0
Quoted Prices in Active Markets (Level 1) [Member] | Mutual funds [Member]
Mutual fund investments
Total mutual fund investments	807	409
Quoted Prices in Active Markets (Level 1) [Member] | Foreign Exchange Contract [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		0
Other Observable Inputs (Level 2) [Member]
Cash equivalents
Total cash equivalents	0	0
Available for sale securities
Available-for-sale Securities	10,798	11,477
Restricted investments
Total restricted investments	0	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	10,798	11,575
Other Observable Inputs (Level 2) [Member] | Money market funds [Member]
Cash equivalents
Total cash equivalents	0	0
Restricted investments
Total restricted investments	0	0
Other Observable Inputs (Level 2) [Member] | Municipal bonds [Member]
Available for sale securities
Available-for-sale Securities	10,798	11,477
Other Observable Inputs (Level 2) [Member] | Mutual funds [Member]
Mutual fund investments
Total mutual fund investments	0	0
Other Observable Inputs (Level 2) [Member] | Foreign Exchange Contract [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		98
Unobservable Inputs (Level 3) [Member]
Cash equivalents
Total cash equivalents	0	0
Available for sale securities
Available-for-sale Securities	0	0
Restricted investments
Total restricted investments	0	0
Mutual fund investments
Total mutual fund investments	0	0
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		0
Total assets at fair value	0	0
Unobservable Inputs (Level 3) [Member] | Money market funds [Member]
Cash equivalents
Total cash equivalents	0	0
Restricted investments
Total restricted investments	0	0
Unobservable Inputs (Level 3) [Member] | Municipal bonds [Member]
Available for sale securities
Available-for-sale Securities	0	0
Unobservable Inputs (Level 3) [Member] | Mutual funds [Member]
Mutual fund investments
Total mutual fund investments	0	0
Unobservable Inputs (Level 3) [Member] | Foreign Exchange Contract [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure		$ 0