XML 28 R50.htm IDEA: XBRL DOCUMENT v2.4.1.9
Reasons for Differences between Company's Effective Tax Rate and Statutory U.S. Federal Income Tax Rate (Detail)
12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2013
Schedule of Effective Tax Rate Reconciliation [Line Items]      
Expected provision at statutory U.S. federal tax rate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State and local income taxes, net of federal tax benefit 3.70%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 2.20%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 3.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Foreign taxes (2.40%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (2.70%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (1.70%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Other (0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.50%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective tax rate 36.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 34.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 36.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations