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Income Taxes - Summary of Income Tax Expense (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Current      
Federal $ 9,299us-gaap_CurrentFederalTaxExpenseBenefit $ 9,270us-gaap_CurrentFederalTaxExpenseBenefit $ 3,753us-gaap_CurrentFederalTaxExpenseBenefit
State 1,668us-gaap_CurrentStateAndLocalTaxExpenseBenefit 1,125us-gaap_CurrentStateAndLocalTaxExpenseBenefit (346)us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Deferred      
Federal 93us-gaap_DeferredFederalIncomeTaxExpenseBenefit (1,091)us-gaap_DeferredFederalIncomeTaxExpenseBenefit 3,278us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State (54)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 125us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 1,014us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Income tax expense $ 11,006us-gaap_IncomeTaxExpenseBenefit $ 9,429us-gaap_IncomeTaxExpenseBenefit $ 7,699us-gaap_IncomeTaxExpenseBenefit