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Commitments and contingencies (Detail Textuals) - One-to-four family residences - Re-performing loans - Purchase commitment $ in Millions | Jun. 30, 2016 USD ($) Property
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Mortgage Loans on Real Estate [Line Items] |
Number of mortgage loans on real estate | Property | 1,063
Aggregate unpaid principal balance of mortgage loans on real estate | $ | $ 189.3

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- Definition Represents the number of re-performing mortgage loans. + References No definition available. + Details
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Namespace Prefix: | ajx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents amount of unpaid principal balance of mortgage loans. + References No definition available. + Details
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Namespace Prefix: | ajx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Details
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Data Type: | na
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |