Aggregate Property Value

No definition available.

Name:	ajx_AggregatePropertyValue
Namespace Prefix:	ajx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents estimated market value of the underlying collateral.

+ References

No definition available.

+ Details

Name:	ajx_EstimatedMarketValueOfUnderlyingCollaterals
Namespace Prefix:	ajx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Investment in securities.

+ References

No definition available.

+ Details

Name:	ajx_InvestmentInSecurities
Namespace Prefix:	ajx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the number of performing mortgage loans.

+ References

No definition available.

+ Details

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Namespace Prefix:	ajx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- 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:	duration

- Definition

Number Of Sellers

+ References

No definition available.

+ Details

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Namespace Prefix:	ajx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents number of transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	ajx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents percentage of estimated market value of the underlying collateral.

+ References

No definition available.

+ Details

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Namespace Prefix:	ajx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage Of Securities Acquired From Trust

+ References

No definition available.

+ Details

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Namespace Prefix:	ajx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents rate of percentage of unpaid principal balance of loan acquired.

+ References

No definition available.

+ Details

Name:	ajx_PercentageOfUnpaidPrincipalBalanceOfLoanAcquired
Namespace Prefix:	ajx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Securities Percentage of Total UPB

+ References

No definition available.

+ Details

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Namespace Prefix:	ajx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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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

+ Details

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

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Balance Type:	na
Period Type:	instant

- Definition

Percentage of financing receivable balance that is past due.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow to reacquire callable preferred stock which is identified as being convertible to another type of financial security.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Details

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- Details

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Subsequent Events (Details)										3 Months Ended
Subsequent Events (Details)	May 06, 2022 USD ($) transaction residentialRPL seller	Apr. 19, 2022 USD ($)	Apr. 14, 2022 USD ($) loanPool	Apr. 01, 2022 USD ($)	Apr. 01, 2022	Apr. 01, 2022 loanPool	Apr. 01, 2022 residentialRPL	Apr. 01, 2022 transaction	Apr. 01, 2022 residentialNPL	Mar. 31, 2022 USD ($) loan	Mar. 31, 2021 USD ($) loan	May 05, 2022 $ / shares
Subsequent Event [Line Items]
Investment in securities										$ 0	$ 0
Repurchase of the Company's senior convertible notes										$ 0	$ 2,430,000
Subsequent event
Subsequent Event [Line Items]
Dividends payable, amount per share (in dollars per share) \| $ / shares												$ 0.26
Subsequent event \| Convertible notes payable
Subsequent Event [Line Items]
Debt instrument, repurchase amount		$ 100,000
Repurchase of the Company's senior convertible notes		$ 100,000
Subsequent event \| Mortgage loans \| Corporate Joint Venture \| Ajax Mortgage Loan Trust 2022-A
Subsequent Event [Line Items]
Investment in securities			$ 47,700,000
Percentage of securities acquired from trust			23.28%
Number of mortgage loans on real estate \| loanPool			811
Original Principal			$ 215,500,000
Aggregate property value			$ 518,800,000
Interest Rate			3.47%
Subsequent event \| Mortgage loans \| Corporate Joint Venture \| Ajax Mortgage Loan Trust 2022-A \| Financing Receivables 60 or More Days Past Due
Subsequent Event [Line Items]
Financing receivable, percent past due			33.90%
Subsequent event \| Mortgage loans \| Corporate Joint Venture \| Ajax Mortgage Loan Trust 2022-A \| Class A Notes
Subsequent Event [Line Items]
Securities percentage of total UPB			71.90%
Residential RPLs
Subsequent Event [Line Items]
Number of mortgage loans on real estate \| loan										0	199
Aggregate unpaid principal balance of mortgage loans on real estate											$ 36,000,000
Residential RPLs \| Two sellers \| Subsequent event
Subsequent Event [Line Items]
Number of mortgage loans on real estate \| residentialRPL	2
Number of transaction \| transaction	2
Number of sellers \| seller	2
Aggregate unpaid principal balance of mortgage loans on real estate	$ 200,000
Percentage of unpaid principal balance of loan acquired	93.10%
Percentage of estimated market value of the underlying collateral				44.30%	44.30%	44.30%	44.30%	44.30%	44.30%
Estimated market value of the underlying collateral	$ 400,000
Residential RPLs \| Seven Sellers \| Subsequent event
Subsequent Event [Line Items]
Number of mortgage loans on real estate \| residentialRPL							26
Number of transaction \| transaction								7
Aggregate unpaid principal balance of mortgage loans on real estate				$ 6,700,000
Percentage of unpaid principal balance of loan acquired					97.20%
Percentage of estimated market value of the underlying collateral				42.60%	42.60%	42.60%	42.60%	42.60%	42.60%
Estimated market value of the underlying collateral				$ 15,300,000
Residential NPLs
Subsequent Event [Line Items]
Number of mortgage loans on real estate \| loan										4	3
Aggregate unpaid principal balance of mortgage loans on real estate										$ 1,000,000	$ 700,000
Residential NPLs \| Two sellers \| Subsequent event
Subsequent Event [Line Items]
Percentage of unpaid principal balance of loan acquired					102.00%
Percentage of estimated market value of the underlying collateral				46.30%	46.30%	46.30%	46.30%	46.30%	46.30%
Estimated market value of the underlying collateral				$ 8,600,000
Residential NPLs \| One seller \| Subsequent event
Subsequent Event [Line Items]
Number of mortgage loans on real estate						1			27
Number of transaction \| transaction								1
Aggregate unpaid principal balance of mortgage loans on real estate	$ 200,000			$ 3,900,000
Percentage of unpaid principal balance of loan acquired	94.00%
Percentage of estimated market value of the underlying collateral				46.20%	46.20%	46.20%	46.20%	46.20%	46.20%
Estimated market value of the underlying collateral	$ 300,000