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Summary of Significant Accounting Policies Fair Value Information (Details) (Fair Value, Measurements, Recurring [Member], USD $)
In Thousands, unless otherwise specified |
Jan. 28, 2012
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Jan. 29, 2011
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Fair Value, Inputs, Level 1 [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Cash Equivalents, at Carrying Value | $ 131,543 | $ 168,929 |
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Fair Value, Inputs, Level 2 [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Cash Equivalents, at Carrying Value | 0 | 0 |
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Fair Value, Inputs, Level 3 [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Cash Equivalents, at Carrying Value | $ 0 | $ 0 |