Represents the percentage of acquisition purchase price for each mortgage loan or real estate owned.

No definition available.

Name:	ajx_PercentageOfAcquisitionPriceOfAssetAsPurchasePriceForEachMortgageLoanOrReo
Namespace Prefix:	ajx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents percentage of guarantors beneficial interest.

+ References

No definition available.

+ Details

Name:	ajx_PercentageOfGuarantorsBeneficialInterest
Namespace Prefix:	ajx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents percentage of purchase price for each mortgage loan.

+ References

No definition available.

+ Details

Name:	ajx_PercentageOfPurchasePriceForEachMortgageLoan
Namespace Prefix:	ajx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents percentage related to servicing fee rate of unpaid principal balance for mortgage loans.

+ References

No definition available.

+ Details

Name:	ajx_ServicingFeeRateOfUnpaidPrincipalBalanceForMortgageLoan
Namespace Prefix:	ajx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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=34725769&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=6451184&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

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
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

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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

- Details

Name:	ajx_AgreementAxis=ajx_RepurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ajx_ReperformingMortgageLoansOnRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ajx_AjaxMortgageLoanTrustA2014Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ajx_AjaxMortgageLoanTrust2014BMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ajx_AjaxMortgageLoanTrustA2015Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ajx_NonperformingMortgageLoansOnRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt (Details Textuals) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
Debt (Details Textuals) - USD ($) $ in Millions	Nov. 25, 2014	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Percentage of guarantors beneficial interest		100.00%
Master Repurchase Agreement
Debt Instrument [Line Items]
Ownership interests in subsidiary	100.00%
Percentage of purchase price for each mortgage loan	65.00%
Interest Rate		4.00%	4.00%
Mortgage loans \| Master Repurchase Agreement
Debt Instrument [Line Items]
Variable rate basis of borrowing	One-month LIBOR
Percentage of purchase price for each mortgage loan or REO	65.00%
Mortgage loans \| Master Repurchase Agreement \| Maximum
Debt Instrument [Line Items]
Loan amount	$ 200
Mortgage loans \| Re-performing loans \| 2014-A
Debt Instrument [Line Items]
Servicing fees percentage		0.65%
Mortgage loans \| Re-performing loans \| 2014-B
Debt Instrument [Line Items]
Servicing fees percentage		0.65%
Mortgage loans \| Re-performing loans \| 2015-A
Debt Instrument [Line Items]
Servicing fees percentage		0.65%
Mortgage loans \| Non-performing loans \| 2014-A
Debt Instrument [Line Items]
Servicing fees percentage		1.25%
Mortgage loans \| Non-performing loans \| 2014-B
Debt Instrument [Line Items]
Servicing fees percentage		1.25%
Mortgage loans \| Non-performing loans \| 2015-A
Debt Instrument [Line Items]
Servicing fees percentage		1.25%