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Selected Quarterly Financial Data - Additional Information (Detail) (USD $)
3 Months Ended 12 Months Ended 3 Months Ended
Jan. 31, 2015
May 03, 2014
Aug. 03, 2013
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
May 04, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Litigation charge   $ 9,200,000us-gaap_LossContingencyAccrualProvision   $ 9,500,000us-gaap_LossContingencyAccrualProvision      
Reversal of estimated expenses 1,500,000rh_ReversalOfEstimatedExpenses            
Non-cash compensation charge       17,072,000us-gaap_ShareBasedCompensation 67,622,000us-gaap_ShareBasedCompensation 116,183,000us-gaap_ShareBasedCompensation  
Cost incurred in connection with follow-on offerings     2,100,000rh_FollowOnOfferingCosts        
Performance-based Vesting Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Non-cash compensation charge     26,200,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rh_PerformanceBasedSharesMember
    800,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rh_PerformanceBasedSharesMember
3,300,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rh_PerformanceBasedSharesMember
Cost incurred in connection with follow-on offerings             800,000rh_FollowOnOfferingCosts
/ us-gaap_AwardTypeAxis
= rh_PerformanceBasedSharesMember
Options Granted [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Non-cash compensation charge     $ 33,700,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rh_OptionsGrantedMember