Fair Value (Table 1) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Jan. 28, 2012
Company's assets measured at fair value
Money market funds	$ 209,041
ARS - available-for-sale - student loan backed	84,650
ARS - available-for-sale - municipal authority bonds	14,858
Municipal notes and bonds held in the Rabbi Trust	0
Derivative financial instruments	10,770
Total assets measured at fair value	319,319
Derivative financial instruments	1,458
Total liabilities measured at fair value	1,458
Level 1 [Member]
Company's assets measured at fair value
Money market funds	209,041
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	0
Total assets measured at fair value	209,041
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	10,770
Total assets measured at fair value	10,770
Derivative financial instruments	1,458
Total liabilities measured at fair value	1,458
Level 3 [Member]
Company's assets measured at fair value
Money market funds	0
ARS - available-for-sale - student loan backed	84,650
ARS - available-for-sale - municipal authority bonds	14,858
Municipal notes and bonds held in the Rabbi Trust	0
Derivative financial instruments	0
Total assets measured at fair value	99,508
Derivative financial instruments	0
Total liabilities measured at fair value	$ 0

Available for sale Municipal authority bonds Fair value disclosure.

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Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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