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Commitments and Contingencies - Additional Information (Detail) (USD $)
 0 Months Ended
Jan. 23, 2015
claim
Apr. 23, 2010
Mar. 13, 2014
Sep. 05, 2014
Mar. 23, 2015
Commitment And Contingencies [Line Items]          
Number of separate putative subclasses 2rhi_LossContingencyNumberofPutativeSubclasses        
David Opalinski and James McCabe          
Commitment And Contingencies [Line Items]          
Allegations loss   $ 0us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= rhi_DavidOpalinskiAndJamesMccabeMember		      
Leonor Rodriguez          
Commitment And Contingencies [Line Items]          
Allegations loss     0us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= rhi_LeonorRodriguezMember		    
Pending Litigation | Theresa Daniels          
Commitment And Contingencies [Line Items]          
Loss contingency       0us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_LitigationCaseAxis
= rhi_TheresaDanielsMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember		  
Pending Litigation | Jessica Gentry          
Commitment And Contingencies [Line Items]          
Loss contingency         0us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_LitigationCaseAxis
= rhi_JessicaGentryMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
Maximum | April Washington          
Commitment And Contingencies [Line Items]          
Allegations loss 1,000,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= rhi_AprilWashingtonMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		        
Minimum | April Washington          
Commitment And Contingencies [Line Items]          
Allegations loss 100,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= rhi_AprilWashingtonMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember