Organization and Basis of Presentation (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended	6 Months Ended		27 Months Ended
	Jan. 31, 2023 USD ($)	Nov. 22, 2019 USD ($)	Jan. 31, 2022 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2023 USD ($) payment entity $ / shares	Jun. 30, 2022 USD ($)	Jan. 31, 2022 USD ($)	Dec. 31, 2022 entity $ / shares	Jan. 01, 2022 payment
Organization And Basis Of Presentation [Line Items]
Number of payments made on RPL mortgage loans (at least) | payment					5
Number of payments not made on NPL mortgage loans | payment					3
SBC loans principal amount					$ 5,000
Proceeds from issuance of private placement				$ 125,000
Common stock, par value per share (in dollars per share) | $ / shares					$ 0.01			$ 0.01
Number of non controlling interest subsidiaries | entity					3			3
Investment in equity method investments					$ 726	$ 6,090
Great Ajax II REIT
Organization And Basis Of Presentation [Line Items]
Ownership percentage by parent (as percent)					99.90%			99.90%
AS Ajax E II LLC
Organization And Basis Of Presentation [Line Items]
Ownership percentage by parent (as percent)					53.10%			53.10%
2017-D
Organization And Basis Of Presentation [Line Items]
Ownership percentage by parent (as percent)					50.00%			50.00%
Ownership percentage by parent (in percent)					50.00%			50.00%
2017-D | Third party
Organization And Basis Of Presentation [Line Items]
Ownership percentage by parent (in percent)					50.00%
Great Ajax Corp | Ellington Financial Operating Partnership LLC
Organization And Basis Of Presentation [Line Items]
Common stock, par value per share (in dollars per share) | $ / shares					$ 0.001
Fixed exchange ratio					0.5308
Thetis Asset Management LLC
Organization And Basis Of Presentation [Line Items]
Ownership percentage (in percent)					19.80%			19.80%
Gaea Real Estate Corp.
Organization And Basis Of Presentation [Line Items]
Ownership percentage (in percent)					22.00%			22.00%
Proceeds from issuance of private placement		$ 66,300	$ 30,000				$ 96,300
Investment in Ajax E Master Trust | AS Ajax E LLC
Organization And Basis Of Presentation [Line Items]
Ownership interest in real estate trust (in percent)					5.00%			5.00%
Great Ajax FS LLC
Organization And Basis Of Presentation [Line Items]
Ownership percentage (in percent)					9.60%			8.00%
Investment in equity method investments	$ 700
Residential RPLs
Organization And Basis Of Presentation [Line Items]
Number of recent payments made on RPL mortgage loans | payment									7