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v3.20.2

Investments - Schedule of securities at acquisition reconciliation between purchase price and par value (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020
Investments, Debt and Equity Securities [Line Items] |  |
Par | $ 0 | $ 11,970
Discount | 0 | (4,888)
Purchase Price | 0 | 7,082
PCD loans |  |
Investments, Debt and Equity Securities [Line Items] |  |
Par | 0 | 227
Discount | $ 0 | $ (37)

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- Definition Beneficial interest purchase price + References No definition available. + Details
Name: | ajx_BeneficialInterestPurchasePrice
Namespace Prefix: | ajx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Discount at acquisition + References No definition available. + Details
Name: | ajx_DiscountAtAcquisition
Namespace Prefix: | ajx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Investments, Debt and Equity Securities + References No definition available. + Details
Name: | ajx_InvestmentsDebtAndEquitySecuritiesLineItems
Namespace Prefix: | ajx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Par value at acquisition + References No definition available. + Details
Name: | ajx_ParValueAtAcquisition
Namespace Prefix: | ajx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | srt_MortgageLoansOnRealEstateLoanTypeAxis=ajx_PCDLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |