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Reconciliation of Net Earnings and Number of Shares Used in Basic and Diluted Earnings Per Share Computations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 28, 2018	Oct. 29, 2017	Oct. 28, 2018	Oct. 29, 2017
Earnings Per Share [Line Items]
Net Earnings, Basic	$ 81,465	$ 71,313	$ 178,346	$ 163,785
Net Earnings, Diluted	$ 81,465	$ 71,313	$ 178,346	$ 163,785
Weighted Average Shares, Basic	80,475	84,940	82,070	86,111
Weighted Average Shares, Effect of dilutive stock-based awards	1,166	444	881	471
Weighted Average Shares, Diluted	81,641	85,384	82,951	86,582
Earnings Per Share, Basic	$ 1.01	$ 0.84	$ 2.17	$ 1.90
Earnings Per Share, Diluted	$ 1.00	$ 0.84	$ 2.15	$ 1.89

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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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