Number of Debt Agreements

No definition available.

Name:	ecpg_NumberofDebtAgreements
Namespace Prefix:	ecpg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Senior secured notes present value inputs discount rate spread.

+ References

No definition available.

+ Details

Name:	ecpg_SeniorSecuredNotesPresentValueInputsDiscountRateSpread
Namespace Prefix:	ecpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16(a))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_SeniorNotes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ecpg_TwoThousandTwentyOneConvertibleSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ecpg_TwoThousandElevenSeniorSecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ecpg_TwoThousandTenSeniorSecuredNotesMember
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Data Type:	na
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Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=ecpg_TwoThousandTwentyTwoConvertibleSeniorNotesMember
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Debt - Encore Senior Secured Notes (Detail)	6 Months Ended
Debt - Encore Senior Secured Notes (Detail)	Jun. 30, 2017 USD ($) agreement	Dec. 31, 2016 USD ($)	Dec. 31, 2011 USD ($)
Debt Instrument [Line Items]
Securitized notes	$ 5,145,000	$ 11,320,000
Basis spread over the current Treasury Rate (percent)	0.50%
Number of agreements \| agreement	2
2021 Convertible Notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate	2.875%
Senior Notes
Debt Instrument [Line Items]
Debt issued			$ 75,000,000.0
2011 Senior Secured Notes
Debt Instrument [Line Items]
Debt issued	$ 25,000,000.0
Debt instrument, stated interest rate	7.375%
Senior secured notes, periodic principal repayment	$ 1,250,000
Securitized notes	3,100,000
2010 Senior Secured Notes
Debt Instrument [Line Items]
Debt issued	$ 50,000,000.0
Debt instrument, stated interest rate	7.75%
Senior secured notes, periodic principal repayment	$ 2,500,000.0
Securitized notes	$ 2,000,000
2022 Convertible Notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate	3.25%