Condensed Consolidated Statements of Earnings (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended
Apr. 30, 2011	Apr. 30, 2010
Consolidated Statements of Earnings [Abstract]
Net sales	$ 761,018	$ 633,586
Cost of sales	317,325	267,608
Gross profit	443,693	365,978
Selling, general and administrative expenses	307,727	260,561
Earnings from operations	135,966	105,417
Interest and other expenses,net	10,147	12,138
Earnings from operations before income taxes	125,819	93,279
Provision for income taxes	44,756	28,854
Net earnings	$ 81,063	$ 64,425
Net earnings per share:
Basic	$ 0.64	$ 0.51
Diluted	$ 0.63	$ 0.5
Weighted-average number of common shares:
Basic	127,601	126,699
Diluted	129,381	128,543

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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