Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

v2.4.1.9
Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]      
U.S. $ 42,898us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 41,249us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 36,857us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign (1,039)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Income before income taxes 41,859us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 41,249us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 36,857us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Current:      
Federal 5,169us-gaap_CurrentFederalTaxExpenseBenefit 4,667us-gaap_CurrentFederalTaxExpenseBenefit 3,977us-gaap_CurrentFederalTaxExpenseBenefit
State 3,895us-gaap_CurrentStateAndLocalTaxExpenseBenefit 2,525us-gaap_CurrentStateAndLocalTaxExpenseBenefit 2,703us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign 0us-gaap_CurrentForeignTaxExpenseBenefit 0us-gaap_CurrentForeignTaxExpenseBenefit 0us-gaap_CurrentForeignTaxExpenseBenefit
Foreign      
Federal 1,146us-gaap_DeferredFederalIncomeTaxExpenseBenefit 2,755us-gaap_DeferredFederalIncomeTaxExpenseBenefit 2,115us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State (649)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (937)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (269)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign (263)us-gaap_DeferredForeignIncomeTaxExpenseBenefit 0us-gaap_DeferredForeignIncomeTaxExpenseBenefit 0us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Provision (benefit) for income taxes $ 9,298us-gaap_IncomeTaxExpenseBenefit $ 9,010us-gaap_IncomeTaxExpenseBenefit $ 8,526us-gaap_IncomeTaxExpenseBenefit
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Tax provision at U.S. federal statutory rate (as a percent) 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income taxes (as a percent) 5.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 2.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 4.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
FICA tip tax credits (as a percent) (16.00%)rrgb_EffectiveIncomeTaxRateReconciliationFICATipTaxCredits (14.80%)rrgb_EffectiveIncomeTaxRateReconciliationFICATipTaxCredits (15.90%)rrgb_EffectiveIncomeTaxRateReconciliationFICATipTaxCredits
Foreign taxes versus U.S statutory rate (as a percent) (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Other tax credits (as a percent) (2.30%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther (2.50%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther
Other (as a percent) 0.50%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 1.60%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective tax rate (as a percent) 22.20%us-gaap_EffectiveIncomeTaxRateContinuingOperations 21.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations 23.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations