Annual report pursuant to Section 13 and 15(d)

Derivative and Other Comprehensive Income (Details)

v2.4.1.9
Derivative and Other Comprehensive Income (Details) (USD $)
12 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Jul. 02, 2014
Aug. 05, 2011
Dec. 14, 2012
Derivative and other comprehensive income            
Charge related to the de-designation of an interest rate swap $ 0rrgb_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDedesignatedDerivativesIncludedInNetIncomeBeforeTax $ 0rrgb_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDedesignatedDerivativesIncludedInNetIncomeBeforeTax $ 1,220,000rrgb_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDedesignatedDerivativesIncludedInNetIncomeBeforeTax      
Losses recognized in OCI on derivative (effective portion) (94,000)us-gaap_DerivativeInstrumentsLossRecognizedInOtherComprehensiveIncomeEffectivePortion (123,000)us-gaap_DerivativeInstrumentsLossRecognizedInOtherComprehensiveIncomeEffectivePortion        
Losses reclassified from AOCI into income (effective portion) (95,000)us-gaap_DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion (80,000)us-gaap_DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion        
Gains recognized in income on derivative (ineffective portion and amount excluded from effectiveness testing) 2,000us-gaap_DerivativeInstrumentsGainRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTesting 5,000us-gaap_DerivativeInstrumentsGainRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTesting        
Previous Credit Facility            
Derivative and other comprehensive income            
Charge related to the de-designation of an interest rate swap     1,200,000rrgb_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDedesignatedDerivativesIncludedInNetIncomeBeforeTax
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
     
New Credit Facility            
Derivative and other comprehensive income            
Maximum borrowing capacity       20,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
   
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 | Interest Rate Swap | Rabobank            
Derivative and other comprehensive income            
Notional amount of derivatives 54,400,000invest_DerivativeNotionalAmount
/ rrgb_DerivativeCounterpartyAxis
= rrgb_RabobankMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
61,900,000invest_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
 
Revolving credit facility | Previous Credit Facility            
Derivative and other comprehensive income            
Maximum borrowing capacity           225,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
Revolving credit facility | New Credit Facility            
Derivative and other comprehensive income            
Maximum borrowing capacity       $ 250,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember