Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Activity Prior to 2014 (Details)

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Acquisitions - Activity Prior to 2014 (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Business Acquisition [Line Items]      
Gain (loss) recognized due to change in fair value of cash consideration $ 377,000us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 $ 167,000us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1  
Acquisitions Prior to 2014      
Business Acquisition [Line Items]      
Fair value of contingent payments 1,000,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= rp_AcquisitionsPriorto2014Member
  1,800,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= rp_AcquisitionsPriorto2014Member
Gain (loss) recognized due to change in fair value of cash consideration 100,000us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
/ us-gaap_BusinessAcquisitionAxis
= rp_AcquisitionsPriorto2014Member
(200,000)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
/ us-gaap_BusinessAcquisitionAxis
= rp_AcquisitionsPriorto2014Member
 
Payments related to acquisitions $ 700,000us-gaap_BusinessCombinationAcquisitionRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= rp_AcquisitionsPriorto2014Member
$ 900,000us-gaap_BusinessCombinationAcquisitionRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= rp_AcquisitionsPriorto2014Member