Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	12 Months Ended
Mar. 31, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loss Contingencies [Line Items]
Future compensation under employment agreements	$ 22.5	$ 22.5
Total future minimum lease payments	36.8	36.8
Amount to be purchased under forward flow agreements	564.4	564.4
Use of cost recovery for income tax purposes - U.S.	244.9praa_DeferredTaxLiabilitiesCostRecovery	244.9praa_DeferredTaxLiabilitiesCostRecovery
Income tax examination, estimate of possible loss	82.6
NCM [Member]
Loss Contingencies [Line Items]
Contingent consideration earn out period		5 years
Maximum value of contingent consideration	15.0	15.0
Payments of contingent consideration			2.8	6.2
Contingent consideration liability	$ 2.4	$ 2.4

Business Acquisition, Contingent Consideration, Cash Payment

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- Definition

Business Acquisition, Contingent Consideration, Potential Cash Payment, Period

+ References

No definition available.

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- Definition

Deferred tax liabilities cost recovery.

+ References

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- Definition

Future compensation under employment agreements.

+ References

No definition available.

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- Definition

Purchase Commitment, Remaining Maximum Amount Committed

+ References

No definition available.

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- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 35

-Paragraph 1

-Subparagraph b

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-Topic 805

-SubTopic 30

-Section 25

-Paragraph 6

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- Definition

Estimated amount of loss resulting from an adverse tax position.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)(3)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

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-Publisher FASB

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-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

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