Fair Value (Table 1) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Oct. 29, 2011
Company's assets measured at fair value
Money market funds	$ 171,513
ARS - available-for-sale - student loan backed	84,897
ARS - available-for-sale - municipal authority bonds	15,437
Municipal notes and bonds held in the Rabbi Trust	11,572
Derivative financial instruments	1,457
Total assets measured at fair value	284,876
Derivative financial instruments	922
Total liabilities measured at fair value	922
Level 1 [Member]
Company's assets measured at fair value
Money market funds	171,513
ARS - available-for-sale - student loan backed	0
ARS - available-for-sale - municipal authority bonds	0
Municipal notes and bonds held in the Rabbi Trust	11,572
Derivative financial instruments	0
Total assets measured at fair value	183,085
Derivative financial instruments	0
Total liabilities measured at fair value	0
Level 2 [Member]
Company's assets measured at fair value
Money market funds	0
ARS - available-for-sale - student loan backed	0
ARS - available-for-sale - municipal authority bonds	0
Municipal notes and bonds held in the Rabbi Trust	0
Derivative financial instruments	1,457
Total assets measured at fair value	1,457
Derivative financial instruments	922
Total liabilities measured at fair value	922
Level 3 [Member]
Company's assets measured at fair value
Money market funds	0
ARS - available-for-sale - student loan backed	84,897
ARS - available-for-sale - municipal authority bonds	15,437
Municipal notes and bonds held in the Rabbi Trust	0
Derivative financial instruments	0
Total assets measured at fair value	100,334
Derivative financial instruments	0
Total liabilities measured at fair value	$ 0

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