Fair Value (Assets and Liabilities at Fair Value) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Oct. 27, 2012	Jan. 28, 2012
ASSETS:
Money market funds		$ 209,039
ARS - available-for-sale - student loan backed	4,755	84,650
ARS - available-for-sale - municipal authority bonds	15,148	14,858
Derivative financial instruments	2,887	10,770
Total assets measured at fair value	22,790	319,317
LIABILITIES:
Derivative financial instruments	2,954	1,458
Total liabilities measured at fair value	2,954	1,458
Level 1 [Member]
ASSETS:
Money market funds		209,039
ARS - available-for-sale - student loan backed	0	0
ARS - available-for-sale - municipal authority bonds	0	0
Derivative financial instruments	0	0
Total assets measured at fair value	0	209,039
LIABILITIES:
Derivative financial instruments	0	0
Total liabilities measured at fair value	0	0
Level 2 [Member]
ASSETS:
Money market funds		0
ARS - available-for-sale - student loan backed	0	0
ARS - available-for-sale - municipal authority bonds	0	0
Derivative financial instruments	2,887	10,770
Total assets measured at fair value	2,887	10,770
LIABILITIES:
Derivative financial instruments	2,954	1,458
Total liabilities measured at fair value	2,954	1,458
Level 3 [Member]
ASSETS:
Money market funds		0
ARS - available-for-sale - student loan backed	4,755	84,650
ARS - available-for-sale - municipal authority bonds	15,148	14,858
Derivative financial instruments	0	0
Total assets measured at fair value	19,903	99,508
LIABILITIES:
Derivative financial instruments	0	0
Total liabilities measured at fair value	$ 0	$ 0

Available for sale Municipal authority bonds Fair value disclosure.

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- Definition

Available for sale Student loan backed Fair value disclosure.

+ References

No definition available.

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Represents the portion of the balance sheet assertion valued at fair value by the entity in connection with the fair value disclosures required in the footnotes to the financial statements. This item represents investments in short-term money-market instruments which are highly liquid and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates.

+ References

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This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

No definition available.

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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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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

+ References

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This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

No definition available.

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