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Fair Value Measurements - Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
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Apr. 28, 2012
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Jan. 28, 2012
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Available-for-Sale Securities, Estimated Fair Value |
$ 14,138 |
$ 14,166 |
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Auction-rate securities [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities, Estimated Fair Value |
14,112 |
14,140 |
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Preferred stock [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Available-for-Sale Securities, Estimated Fair Value |
26 |
26 |
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Mutual funds [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Trading securities (including mutual funds) |
9,858 |
8,581 |
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Fair Value, Measurements, Recurring [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Totals |
23,996 |
22,747 |
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Fair Value, Measurements, Recurring [Member] | Auction-rate securities [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities, Estimated Fair Value |
14,112 |
14,140 |
|
Fair Value, Measurements, Recurring [Member] | Preferred stock [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities, Estimated Fair Value |
26 |
26 |
|
Fair Value, Measurements, Recurring [Member] | Mutual funds [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Trading securities (including mutual funds) |
9,858 |
8,581 |
|
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Totals |
9,884 |
8,607 |
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Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Preferred stock [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities, Estimated Fair Value |
26 |
26 |
|
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mutual funds [Member]
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Trading securities (including mutual funds) |
9,858 |
8,581 |
|
Fair Value, Measurements, Recurring [Member] | Significant Observable Inputs (Level 2) [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Totals |
2,917 |
2,920 |
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Fair Value, Measurements, Recurring [Member] | Significant Observable Inputs (Level 2) [Member] | Auction-rate securities [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Available-for-Sale Securities, Estimated Fair Value |
2,917 |
2,920 |
|
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [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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| Totals |
11,195 |
11,220 |
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Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Auction-rate securities [Member]
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Available-for-Sale Securities, Estimated Fair Value |
$ 11,195 |
$ 11,220 |