Reconciliation of Net Earnings and Number of Shares Used in Basic and Diluted Earnings Per Share Computations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Aug. 04, 2013	Jul. 29, 2012	Aug. 04, 2013	Jul. 29, 2012
Earnings Per Share [Line Items]
Net Earnings, Basic	$ 48,919	$ 43,380	$ 88,385	$ 74,096
Net Earnings, Diluted	$ 48,919	$ 43,380	$ 88,385	$ 74,096
Weighted Average Shares, Basic	96,892	99,209	97,470	99,815
Weighted Average Shares, Effect of dilutive stock-based awards	2,065	1,609	1,895	1,726
Weighted Average Shares, Diluted	98,957	100,818	99,365	101,541
Earnings Per Share, Basic	$ 0.50	$ 0.44	$ 0.91	$ 0.74
Earnings Per Share, Diluted	$ 0.49	$ 0.43	$ 0.89	$ 0.73

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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