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Related Party Transactions (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended 0 Months Ended
Mar. 01, 2014
Sep. 30, 2013
Feb. 28, 2015
Mar. 02, 2013
Jul. 22, 2013
Related Party Transactions          
Receivables from related parties $ 19us-gaap_DueFromRelatedParties   $ 15us-gaap_DueFromRelatedParties    
Par value of common stock (in dollars per share) $ 1us-gaap_CommonStockParOrStatedValuePerShare $ 1.00us-gaap_CommonStockParOrStatedValuePerShare $ 1us-gaap_CommonStockParOrStatedValuePerShare    
Closing price per share (in dollars per share)   $ 4.76us-gaap_SharePrice      
Redemption percentage of the liquidation preference per share   105.00%rad_PreferredStockRedemptionPercentageOfLiquidationPreferencePerShare      
Liquidation preference (in dollars per share)   $ 100us-gaap_PreferredStockLiquidationPreference      
Liquidation preference   199,937us-gaap_PreferredStockLiquidationPreferenceValue      
Conversion of Series G and H preferred stock 25,603us-gaap_ConvertiblePreferredStockConvertedToOtherSecurities        
Common Stock          
Related Party Transactions          
Common stock issued upon redemption of preferred stock (in shares) 40,000,000us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Market value of common stock issued upon redemption of preferred stock 40,000us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Series G preferred stock          
Related Party Transactions          
Quarterly dividend (as a percent)   7.00%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
     
Market value of common stock issued upon redemption of preferred stock (1)us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
       
Liquidation preference (in dollars per share) $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
$ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
  $ 100us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
 
Series H preferred stock          
Related Party Transactions          
Quarterly dividend (as a percent)   6.00%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesHPreferredStockMember
     
Common stock issued upon redemption of preferred stock (in shares) (1,904,000)us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesHPreferredStockMember
       
Market value of common stock issued upon redemption of preferred stock (190,415)us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesHPreferredStockMember
       
Preferred Stock (Series G and H)          
Related Party Transactions          
Preferred stock outstanding (in shares)   0us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Contracted conversion rate (in dollars per share)   $ 5.50rad_ConvertiblePreferredStockContractedConversionRate
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Total common stock shares issuable at contracted conversion rate   34,621,117rad_StockIssuableDuringPeriodSharesConversionOfConvertibleSecuritiesAtContractedConversionRate
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Conversion of Series G and H preferred stock   25,603us-gaap_ConvertiblePreferredStockConvertedToOtherSecurities
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Diluted earning per share due to conversion of preferred stock (in dollars per share)   $ 0.03rad_ConversionOfConvertibleSecuritiesEffectOnEarningsPerShareDiluted
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Green Equity Investors III, L.P. ("LGP") | Common Stock          
Related Party Transactions          
Common stock issued upon redemption of preferred stock (in shares)   40,000,000us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Market value of common stock issued upon redemption of preferred stock   190,400us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Green Equity Investors III, L.P. ("LGP") | Series G preferred stock          
Related Party Transactions          
Number of shares agreed to be exchanged   8us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
     
Green Equity Investors III, L.P. ("LGP") | Series H preferred stock          
Related Party Transactions          
Number of shares agreed to be exchanged   1,876,013us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesHPreferredStockMember
     
Green Equity Investors III, L.P. ("LGP") | Preferred Stock (Series G and H)          
Related Party Transactions          
Preferred stock outstanding (in shares)   1,904,161us-gaap_PreferredStockSharesOutstanding
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Shares of earned and unpaid dividends   28,140rad_PreferredStockEarnedAndUnpaidDividendSharesOutstanding
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Total common stock shares issuable at contracted conversion rate   34,621,117rad_StockIssuableDuringPeriodSharesConversionOfConvertibleSecuritiesAtContractedConversionRate
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Conversion of Series G and H preferred stock   $ 25,603us-gaap_ConvertiblePreferredStockConvertedToOtherSecurities
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Diluted earning per share due to conversion of preferred stock (in dollars per share)   $ 0.03rad_ConversionOfConvertibleSecuritiesEffectOnEarningsPerShareDiluted
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Additional common stock issued upon redemption of preferred stock (in shares)   5,378,883rad_StockAdditionallyIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_CounterpartyNameAxis
= rad_GreenEquityInvestorsIIILPMember
/ us-gaap_StatementClassOfStockAxis
= rad_SeriesGAndHPreferredStockMember
     
Jean Coutu Group          
Related Party Transactions          
Number of shares sold         65,401,162rad_RelatedPartyTransactionNumberOfSharesSoldOrDisposed
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= rad_JeanCoutuGroupMember