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Stock-Based Compensation - Narrative (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
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3 Months Ended |
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Apr. 28, 2012
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Apr. 30, 2011
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
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| Excess tax benefit realized from exercised stock options |
$ 3,709 |
$ 1,024 |
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Stock Options [Member]
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|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options expiration period |
10 years |
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| Shares available for grant |
637,509 |
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| Excess tax benefit realized from exercised stock options |
3,709 |
1,024 |
| Stock options granted |
0 |
0 |
| Total intrinsic value of options exercised |
11,300 |
3,016 |
| Unrecognized compensation expense |
0 |
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Stock Options [Member] | Executive Officers [Member]
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|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares available for grant |
447,884 |
|
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Restricted Stock [Member]
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|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares available for grant |
89,624 |
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| Unrecognized compensation expense |
13,447 |
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| Expected weighted average period of unrecognized compensation expense recognition, years |
2 years 3 months 18 days |
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| Total fair value of shares vested |
$ 2,767 |
$ 1,161 |
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Restricted Stock [Member] | Restricted Stock Plan 2005 [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares vested description |
Shares granted under the 2005 Plan typically vest over a period of four years, only upon certification by the Compensation Committee of the Board of Directors that the Company has achieved its pre-established performance targets for the fiscal year. |
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| Vesting period |
4 years |
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Restricted Stock [Member] | Director Restricted Stock Plan 2008 [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares vested description |
Shares granted under the 2008 Director Plan vest 25% on the date of grant and then in equal portions on each of the first three anniversaries of the date of grant. |
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| Percentage of shares vesting annually |
25.00% |
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| Vesting period |
3 years |
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Restricted Stock [Member] | Executive Officers [Member]
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|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares available for grant |
51,000 |
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