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Borrowings - Aktiv Subordinated Loan (Details) (Aktiv Kapital AS [Member], Subordinated Loan [Member], USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Debt Instrument [Line Items]  
Repayments of debt $ 30.0us-gaap_RepaymentsOfDebt
LIBOR [Member]
  
Debt Instrument [Line Items]  
Basis spread variable rate 3.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ dei_LegalEntityAxis
= praa_AktivKapitalASMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember