Annual report pursuant to Section 13 and 15(d)

Borrowings (Details)

v2.4.1.9
Borrowings (Details) (USD $)
1 Months Ended 12 Months Ended 0 Months Ended
Dec. 30, 2012
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Dec. 14, 2012
Jul. 02, 2014
Borrowings            
Debt and capital lease obligations   $ 147,896,000us-gaap_DebtAndCapitalLeaseObligations $ 88,714,000us-gaap_DebtAndCapitalLeaseObligations      
Less: Current portion   (583,000)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent (826,000)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent      
Long-term debt and capital lease obligations   147,313,000us-gaap_LongTermDebtAndCapitalLeaseObligations 87,888,000us-gaap_LongTermDebtAndCapitalLeaseObligations      
Maturities of long-term debt and capital lease obligations            
2015   583,000rrgb_LongTermDebtandCapitalLeaseObligationsDueinNextTwelveMonths        
2016   535,000rrgb_LongTermDebtAndCapitalLeaseObligationsDueInYearTwo        
2017   564,000rrgb_LongTermDebtAndCapitalLeaseObligationsDueInYearThree        
2018   598,000rrgb_LongTermDebtAndCapitalLeaseObligationsDueInYearFour        
2019   139,136,000rrgb_LongTermDebtAndCapitalLeaseObligationsDueInYearFive        
Thereafter   6,480,000rrgb_LongTermDebtAndCapitalLeaseObligationsDueThereafter        
Debt and capital lease obligations   147,896,000us-gaap_DebtAndCapitalLeaseObligations 88,714,000us-gaap_DebtAndCapitalLeaseObligations      
Additional disclosure            
Loan origination costs   1,800,000us-gaap_UnamortizedDebtIssuanceExpense 1,400,000us-gaap_UnamortizedDebtIssuanceExpense      
Write-off of unamortized fees 700,000us-gaap_WriteOffOfDeferredDebtIssuanceCost          
Charge related to the de-designation of an interest rate swap   0rrgb_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDedesignatedDerivativesIncludedInNetIncomeBeforeTax 0rrgb_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDedesignatedDerivativesIncludedInNetIncomeBeforeTax 1,220,000rrgb_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDedesignatedDerivativesIncludedInNetIncomeBeforeTax    
Capital lease obligations            
Borrowings            
Debt and capital lease obligations   8,521,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
9,339,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
     
Weighted Average Interest Rate   5.11%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
5.43%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
     
Maturities of long-term debt and capital lease obligations            
Debt and capital lease obligations   8,521,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
9,339,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
     
Previous Credit Facility            
Additional disclosure            
Additional borrowing capacity subject to lender participation         100,000,000rrgb_DebtInstrumentContingentIncreaseInBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
 
Non-cash pre-tax charge       2,900,000rrgb_WriteOffOfDeferredDebtIssuanceCostAndInterestRateCashFlowHedgeLossReclassifiedToEarnings
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
   
Write-off of unamortized fees       1,700,000us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
   
Charge related to the de-designation of an interest rate swap       1,200,000rrgb_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDedesignatedDerivativesIncludedInNetIncomeBeforeTax
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
   
Previous Credit Facility | LIBOR            
Additional disclosure            
Variable interest rate basis         LIBOR  
Previous Credit Facility | Base rate            
Additional disclosure            
Variable interest rate basis         Base rate  
Previous Credit Facility | Prime rate            
Additional disclosure            
Variable interest rate basis         Prime Rate  
Previous Credit Facility | Federal funds rate            
Additional disclosure            
Variable interest rate basis         Federal Funds  
Previous Credit Facility | One month LIBOR rate            
Additional disclosure            
Variable interest rate basis         LIBOR for an interest Period of one month  
Previous Credit Facility | Revolving credit facility            
Additional disclosure            
Maximum borrowing capacity         225,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
 
Amounts outstanding     78,500,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
     
Previous Credit Facility | Letter of credit            
Additional disclosure            
Maximum borrowing capacity         25,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LetterOfCreditMember
 
Amounts outstanding     8,100,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LetterOfCreditMember
     
Previous Credit Facility | Swingline loans            
Additional disclosure            
Maximum borrowing capacity         15,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= rrgb_SwinglineLoansMember
 
New Credit Facility            
Additional disclosure            
Maximum borrowing capacity           20,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
Additional borrowing capacity subject to lender participation           100,000,000rrgb_DebtInstrumentContingentIncreaseInBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
New Credit Facility | LIBOR            
Additional disclosure            
Variable interest rate basis   LIBOR        
New Credit Facility | Base rate            
Additional disclosure            
Variable interest rate basis   Base rate        
New Credit Facility | Prime rate            
Additional disclosure            
Variable interest rate basis   Prime Rate        
New Credit Facility | Federal funds rate            
Additional disclosure            
Variable interest rate basis   Federal Funds        
New Credit Facility | One month LIBOR rate            
Additional disclosure            
Variable interest rate basis   LIBOR for an interest Period of one month        
New Credit Facility | Revolving credit facility            
Borrowings            
Debt and capital lease obligations   139,375,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
79,375,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
     
Weighted Average Interest Rate   1.71%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
1.73%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
     
Maturities of long-term debt and capital lease obligations            
Debt and capital lease obligations   139,375,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
79,375,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
     
Additional disclosure            
Maximum borrowing capacity           250,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
Amounts outstanding   138,500,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
       
New Credit Facility | Letter of credit            
Additional disclosure            
Maximum borrowing capacity           25,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LetterOfCreditMember
Amounts outstanding   8,200,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LetterOfCreditMember
       
New Credit Facility | Swingline loans            
Additional disclosure            
Maximum borrowing capacity           15,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= rrgb_SwinglineLoansMember
Federal Funds Rate | Previous Credit Facility | Revolving credit facility            
Additional disclosure            
Interest rate margin (as a percent)         0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_FederalFundsEffectiveSwapRateMember
 
Federal Funds Rate | New Credit Facility | Revolving credit facility            
Additional disclosure            
Interest rate margin (as a percent)           0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_FederalFundsEffectiveSwapRateMember
LIBOR | Previous Credit Facility | Revolving credit facility            
Additional disclosure            
Interest rate margin (as a percent)         1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= rrgb_PreviousCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
 
LIBOR | New Credit Facility | Revolving credit facility            
Additional disclosure            
Interest rate margin (as a percent)           1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
Canadian Dealer Offered Rate (CDOR) | New Credit Facility | Revolving credit facility            
Additional disclosure            
Interest rate margin (as a percent)           1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= rrgb_CanadianDealerOfferedRateMember
Other assets, net | New Credit Facility            
Additional disclosure            
Loan origination costs           700,000us-gaap_UnamortizedDebtIssuanceExpense
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentAssetsMember
/ us-gaap_DebtInstrumentAxis
= rrgb_NewCreditFacilityMember