|
Investments And Restricted Investments (Investments And Restricted Investments) (Details) (USD $)
In Thousands, unless otherwise specified
|
Apr. 28, 2012
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Jan. 28, 2012
|
Apr. 30, 2011
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
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| Total investments measured at fair value |
$ 11,700 |
$ 11,911 |
$ 15,466 |
|
Corporate Securities [Member]
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|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
7,745 |
|
Mortgage-Backed Securities [Member]
|
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
1,052 |
|
U.S. Government And Agency Securities [Member]
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|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
6,669 |
|
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
4,184 |
4,200 |
6,669 |
|
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Corporate Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Mortgage-Backed Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Government And Agency Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
6,669 |
|
Significant Other Observable Inputs (Level 2) [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
7,516 |
7,711 |
8,797 |
|
Significant Other Observable Inputs (Level 2) [Member] | Corporate Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
7,745 |
|
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-Backed Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
1,052 |
|
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government And Agency Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Significant Unobservable Inputs (Level 3) [Member]
|
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
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| Total investments measured at fair value |
|
|
|
|
Significant Unobservable Inputs (Level 3) [Member] | Corporate Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Significant Unobservable Inputs (Level 3) [Member] | Mortgage-Backed Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Significant Unobservable Inputs (Level 3) [Member] | U.S. Government And Agency Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
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Investments [Member]
|
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
6,077 |
6,260 |
|
|
Investments [Member] | Corporate Securities [Member]
|
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
5,538 |
5,503 |
7,745 |
|
Investments [Member] | Mortgage-Backed Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
539 |
757 |
1,052 |
|
Investments [Member] | U.S. Government And Agency Securities [Member]
|
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
6,669 |
|
Investments [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Investments [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Corporate Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Investments [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Mortgage-Backed Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Investments [Member] | Significant Other Observable Inputs (Level 2) [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
6,077 |
6,260 |
|
|
Investments [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
5,538 |
5,503 |
|
|
Investments [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage-Backed Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
539 |
757 |
|
|
Investments [Member] | Significant Unobservable Inputs (Level 3) [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Investments [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Investments [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage-Backed Securities [Member]
|
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Restricted Investments [Member]
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|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
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| Total investments measured at fair value |
5,623 |
5,651 |
|
|
Restricted Investments [Member] | Corporate Securities [Member]
|
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
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| Total investments measured at fair value |
1,439 |
1,451 |
|
|
Restricted Investments [Member] | U.S. Government And Agency Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
4,184 |
4,200 |
|
|
Restricted Investments [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
4,184 |
4,200 |
|
|
Restricted Investments [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Corporate Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Restricted Investments [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Government And Agency Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
4,184 |
4,200 |
|
|
Restricted Investments [Member] | Significant Other Observable Inputs (Level 2) [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
1,439 |
1,451 |
|
|
Restricted Investments [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
1,439 |
1,451 |
|
|
Restricted Investments [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Government And Agency Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Restricted Investments [Member] | Significant Unobservable Inputs (Level 3) [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Restricted Investments [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
|
|
|
Restricted Investments [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Government And Agency Securities [Member]
|
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Total investments measured at fair value |
|
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