XML 34 R47.htm IDEA: XBRL DOCUMENT v2.4.1.9
Income Taxes - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]      
Net operating loss carryforwards, foreign $ 29,900,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign    
Foreign related tax credits 3,600,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign    
California enterprise zone tax credits 5,700,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness    
Tax credit carry forwards expected to be utilized 3,100,000us-gaap_DeferredTaxAssetsValuationAllowanceNoncurrent    
Deferred income taxes, undistributed foreign earnings 3,700,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings 2,800,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings  
Impact of repatriation, net of foreign tax credits 0rhi_DeferredIncomeTaxesImpactOfRepatriationNetOfForeignTaxCredits 0rhi_DeferredIncomeTaxesImpactOfRepatriationNetOfForeignTaxCredits  
Unrecognized tax benefits, impact on effective tax rate 900,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate 1,300,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate 1,000,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Accrued interest and penalties 2,500,000us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued 2,800,000us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued 3,100,000us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued
Increase (decrease) in income tax expense 300,000us-gaap_IncreaseDecreaseInIncomeTaxes 300,000us-gaap_IncreaseDecreaseInIncomeTaxes 2,300,000us-gaap_IncreaseDecreaseInIncomeTaxes
Unrecognized tax benefits, gross $ 2,200,000rhi_UnrecognizedTaxBenefitsFromCurrentPeriodGross    
Foreign Countries      
Income Taxes [Line Items]      
Net operating loss carry forwards expiring in and beyond the stated year expire in 2015 and later    
Tax credit carry forwards expiring in and beyond the stated year expire in 2024    
California enterprise zone [Member]      
Income Taxes [Line Items]      
Tax credit carry forwards expiring in and beyond the stated year expire in 2023