Annual report pursuant to Section 13 and 15(d)

Debt - Previous Credit Facility (Detail)

v2.4.1.9
Debt - Previous Credit Facility (Detail) (USD $)
6 Months Ended 9 Months Ended
Jun. 30, 2014
Sep. 30, 2014
Dec. 31, 2014
May 31, 2014
Dec. 31, 2013
Line of Credit Facility [Line Items]          
Stock Repurchase Program, Authorized Amount 50,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1     $ 75,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1  
Value of equipment used by employees 2,500,000rp_LineofCreditFacilityValueofEquipmentinHandsofEmployeesConsultantsorCustomers        
Aggregate permitted acquisition limit 150,000,000.0rp_LineofCreditFacilityAggregatePermittedAcquisitionLimit        
Additional borrowing capacity under certain conditions 100,000,000.0rp_LineofCreditFacilityAdditionalBorrowingCapacityunderCertainConditions        
Revolving line of credit facility borrowed 25,000,000us-gaap_LineOfCredit   20,000,000us-gaap_LineOfCredit   0us-gaap_LineOfCredit
Standby Letters of Credit          
Line of Credit Facility [Line Items]          
Sub limit for issuance of letters of credit 10,000,000rp_SublimitForIssuanceOfLettersOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember
10,000,000rp_SublimitForIssuanceOfLettersOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember
     
Revolving Credit Facility          
Line of Credit Facility [Line Items]          
Aggregate principal amount 150,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
200,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
     
Federal Funds Rate          
Line of Credit Facility [Line Items]          
Basis spread on variable rate 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_VariableRateAxis
= us-gaap_FederalFundsEffectiveSwapRateMember
       
Federal Funds Rate | Revolving Credit Facility          
Line of Credit Facility [Line Items]          
Basis spread on variable rate   0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_FederalFundsEffectiveSwapRateMember
     
Three-Month LIBOR          
Line of Credit Facility [Line Items]          
Basis spread on variable rate 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_VariableRateAxis
= rp_ThreeMonthLIBORMember
       
Three-Month LIBOR | Minimum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate 2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= rp_ThreeMonthLIBORMember
       
Three-Month LIBOR | Maximum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate 2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= rp_ThreeMonthLIBORMember
       
Prime Rate | Minimum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate 0.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
       
Prime Rate | Maximum          
Line of Credit Facility [Line Items]          
Basis spread on variable rate 0.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember