Quarterly report pursuant to Section 13 or 15(d)

Derivative and Other Comprehensive Income (Details)

v2.4.1.9
Derivative and Other Comprehensive Income (Details) (USD $)
4 Months Ended
Apr. 19, 2015
Apr. 20, 2014
Dec. 28, 2014
interest_rate_swap
Aug. 05, 2011
Interest Rate Swap | Rabobank        
Derivative and other comprehensive income        
Number of derivative instruments held 1us-gaap_DerivativeNumberOfInstrumentsHeld
/ rrgb_DerivativeCounterpartyAxis
= rrgb_RabobankMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
  1us-gaap_DerivativeNumberOfInstrumentsHeld
/ rrgb_DerivativeCounterpartyAxis
= rrgb_RabobankMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
 
Estimated notional hedge amount on expiration date which is June 30, 2015 $ 50,600,000rrgb_DerivativeNotionalAmountOnExpiration
/ rrgb_DerivativeCounterpartyAxis
= rrgb_RabobankMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
     
Fixed rate of interest on derivative (as a percent) 1.135%us-gaap_DerivativeFixedInterestRate
/ rrgb_DerivativeCounterpartyAxis
= rrgb_RabobankMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
     
Cash Flow Hedging        
Derivative and other comprehensive income        
Losses recognized in OCI on derivative (effective portion) (3,000)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
(70,000)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
   
Losses reclassified from AOCI into income (effective portion) (23,000)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
(29,000)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
   
Cash Flow Hedging | Interest Rate Swap | Rabobank        
Derivative and other comprehensive income        
Notional amount of derivatives $ 52,500,000invest_DerivativeNotionalAmount
/ rrgb_DerivativeCounterpartyAxis
= rrgb_RabobankMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
  54,400,000invest_DerivativeNotionalAmount
/ rrgb_DerivativeCounterpartyAxis
= rrgb_RabobankMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
$ 74,100,000invest_DerivativeNotionalAmount
/ rrgb_DerivativeCounterpartyAxis
= rrgb_RabobankMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember