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Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Net sales	$ 3,323,077us-gaap_SalesRevenueNet	$ 3,086,608us-gaap_SalesRevenueNet	$ 2,794,925us-gaap_SalesRevenueNet
Cost of sales	2,148,147us-gaap_CostOfGoodsAndServicesSold	1,925,266us-gaap_CostOfGoodsAndServicesSold	1,763,394us-gaap_CostOfGoodsAndServicesSold
Gross profit	1,174,930us-gaap_GrossProfit	1,161,342us-gaap_GrossProfit	1,031,531us-gaap_GrossProfit
Selling, general and administrative expenses	809,545us-gaap_SellingGeneralAndAdministrativeExpense	734,511us-gaap_SellingGeneralAndAdministrativeExpense	657,246us-gaap_SellingGeneralAndAdministrativeExpense
Income from operations	365,385us-gaap_OperatingIncomeLoss	426,831us-gaap_OperatingIncomeLoss	374,285us-gaap_OperatingIncomeLoss
Interest income	2,319us-gaap_InvestmentIncomeInterest	2,713us-gaap_InvestmentIncomeInterest	2,126us-gaap_InvestmentIncomeInterest
Other income	580us-gaap_OtherNonoperatingIncome	1,088us-gaap_OtherNonoperatingIncome	862us-gaap_OtherNonoperatingIncome
Other expenses	(4,834)us-gaap_OtherNonoperatingExpense	(3,114)us-gaap_OtherNonoperatingExpense	(1,701)us-gaap_OtherNonoperatingExpense
Income before income taxes	363,450us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	427,518us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	375,572us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax expense	131,022us-gaap_IncomeTaxExpenseBenefit	145,158us-gaap_IncomeTaxExpenseBenefit	138,258us-gaap_IncomeTaxExpenseBenefit
Net income	$ 232,428us-gaap_NetIncomeLoss	$ 282,360us-gaap_NetIncomeLoss	$ 237,314us-gaap_NetIncomeLoss
Net income per common share:
Basic	$ 1.70us-gaap_EarningsPerShareBasic	$ 1.92us-gaap_EarningsPerShareBasic	$ 1.63us-gaap_EarningsPerShareBasic
Diluted	$ 1.68us-gaap_EarningsPerShareDiluted	$ 1.89us-gaap_EarningsPerShareDiluted	$ 1.62us-gaap_EarningsPerShareDiluted
Weighted-average common shares outstanding:
Basic	136,651,899us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	147,014,869us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	145,253,691us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted	138,192,734us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	149,225,906us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	146,663,731us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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- Definition

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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