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Condensed Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Apr. 30, 2012	Apr. 30, 2011
Condensed Consolidated Statements Of Income [Abstract]
Net sales	$ 568,930	$ 524,019
Cost of sales, including certain buying, distribution and occupancy costs	366,451	330,654
Gross profit	202,479	193,365
Selling, general and administrative expenses	149,564	134,529
Income from operations	52,915	58,836
Other income, net	299	1,365
Income before income taxes	53,214	60,201
Income tax expense	19,257	21,577
Net income	$ 33,957	$ 38,624
Net income per common share:
Basic	$ 0.24	$ 0.24
Diluted	$ 0.23	$ 0.23
Weighted average common shares outstanding:
Basic	144,709,199	162,407,330
Diluted	145,568,667	165,293,594

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration