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Fair Value of Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Bank Loan Obligations [Member]    
Fair Value of Financial Instruments (Textual) [Abstract]    
Fair value of long term debt $ 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_BankLoanObligationsMember		 $ 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_BankLoanObligationsMember
Business Acquisition Obligations [Member]    
Fair Value of Financial Instruments (Textual) [Abstract]    
Fair value of long term debt $ 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= prgx_BusinessAcquisitionObligationsMember		 $ 0us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= prgx_BusinessAcquisitionObligationsMember