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Summary of Stock Option Activity (Detail) - USD ($) | 12 Months Ended
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Jan. 31, 2016 | Feb. 01, 2015 | Feb. 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Balance at February 1, 2015, shares |  | 107,000 |  |
Granted, shares |  | 0 | 0 | 0
Exercised, shares |  | (68,500) |  |
Cancelled, shares |  | 0 |  |
Balance at January 31, 2016 |  | 38,500 | 107,000 |
Balance at February 1, 2015 weighted average exercise price |  | $ 39.05 |  |
Granted, weighted average exercise price |  | 0 |  |
Exercised, weighted average exercise price |  | 38.64 |  |
Cancelled, weighted average exercise price |  | 0 |  |
Balance at January 31, 2016,weighted average exercise price |  | $ 39.80 | $ 39.05 |
Balance at January 31, 2016, weighted average contractual term remaining (years) |  | 3 months 22 days |  |
Balance at January 31, 2016, intrinsic value | [1] | $ 457,000 |  |
[1] | Intrinsic value for outstanding and vested options is based on the excess of the market value of our common stock on the last business day of the fiscal year (or $51.66) over the exercise price.

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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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