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Mortgage Loans - Schedule Of Carrying Value Of Mortgage Loans And Related UPB By Delinquency Status (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Mortgage loans held-for-investment, net
Mortgage Loans on Real Estate
Total	$ 403,056	$ 864,551
Mortgage loans held-for-investment, net | Current
Mortgage Loans on Real Estate
Total	328,774	558,780
Mortgage loans held-for-investment, net | 30
Mortgage Loans on Real Estate
Total	35,542	106,557
Mortgage loans held-for-investment, net | 60
Mortgage Loans on Real Estate
Total	1,352	1,625
Mortgage loans held-for-investment, net | 90
Mortgage Loans on Real Estate
Total	29,488	161,119
Mortgage loans held-for-investment, net | Foreclosure
Mortgage Loans on Real Estate
Total	7,900	36,470
Mortgage loans held-for-investment, net | 2019-D
Mortgage Loans on Real Estate
Total	92,815
Mortgage loans held-for-investment, net | 2019-D | Current
Mortgage Loans on Real Estate
Total	83,487
Mortgage loans held-for-investment, net | 2019-D | 30
Mortgage Loans on Real Estate
Total	5,215
Mortgage loans held-for-investment, net | 2019-D | 60
Mortgage Loans on Real Estate
Total	188
Mortgage loans held-for-investment, net | 2019-D | 90
Mortgage Loans on Real Estate
Total	2,884
Mortgage loans held-for-investment, net | 2019-D | Foreclosure
Mortgage Loans on Real Estate
Total	1,041
Mortgage loans held-for-investment, net | 2019-F
Mortgage Loans on Real Estate
Total	90,384
Mortgage loans held-for-investment, net | 2019-F | Current
Mortgage Loans on Real Estate
Total	70,417
Mortgage loans held-for-investment, net | 2019-F | 30
Mortgage Loans on Real Estate
Total	8,619
Mortgage loans held-for-investment, net | 2019-F | 60
Mortgage Loans on Real Estate
Total	85
Mortgage loans held-for-investment, net | 2019-F | 90
Mortgage Loans on Real Estate
Total	8,610
Mortgage loans held-for-investment, net | 2019-F | Foreclosure
Mortgage Loans on Real Estate
Total	2,653
Mortgage loans held-for-investment, net | 2020-B
Mortgage Loans on Real Estate
Total	96,308
Mortgage loans held-for-investment, net | 2020-B | Current
Mortgage Loans on Real Estate
Total	71,086
Mortgage loans held-for-investment, net | 2020-B | 30
Mortgage Loans on Real Estate
Total	12,377
Mortgage loans held-for-investment, net | 2020-B | 60
Mortgage Loans on Real Estate
Total	683
Mortgage loans held-for-investment, net | 2020-B | 90
Mortgage Loans on Real Estate
Total	9,839
Mortgage loans held-for-investment, net | 2020-B | Foreclosure
Mortgage Loans on Real Estate
Total	2,323
Mortgage loans held-for-investment, net | 2021-A
Mortgage Loans on Real Estate
Total	121,089
Mortgage loans held-for-investment, net | 2021-A | Current
Mortgage Loans on Real Estate
Total	101,683
Mortgage loans held-for-investment, net | 2021-A | 30
Mortgage Loans on Real Estate
Total	9,289
Mortgage loans held-for-investment, net | 2021-A | 60
Mortgage Loans on Real Estate
Total	396
Mortgage loans held-for-investment, net | 2021-A | 90
Mortgage Loans on Real Estate
Total	7,838
Mortgage loans held-for-investment, net | 2021-A | Foreclosure
Mortgage Loans on Real Estate
Total	1,883
Mortgage loans held-for-investment, net | 18-1 LLC
Mortgage Loans on Real Estate
Total	2,460
Mortgage loans held-for-investment, net | 18-1 LLC | Current
Mortgage Loans on Real Estate
Total	2,101
Mortgage loans held-for-investment, net | 18-1 LLC | 30
Mortgage Loans on Real Estate
Total	42
Mortgage loans held-for-investment, net | 18-1 LLC | 60
Mortgage Loans on Real Estate
Total	0
Mortgage loans held-for-investment, net | 18-1 LLC | 90
Mortgage Loans on Real Estate
Total	317
Mortgage loans held-for-investment, net | 18-1 LLC | Foreclosure
Mortgage Loans on Real Estate
Total	0
Mortgage loans held-for-investment, net | GAOP - 7f7 >50
Mortgage Loans on Real Estate
Total		313,803
Mortgage loans held-for-investment, net | GAOP - 7f7 >50 | Current
Mortgage Loans on Real Estate
Total		199,229
Mortgage loans held-for-investment, net | GAOP - 7f7 >50 | 30
Mortgage Loans on Real Estate
Total		49,868
Mortgage loans held-for-investment, net | GAOP - 7f7 >50 | 60
Mortgage Loans on Real Estate
Total		283
Mortgage loans held-for-investment, net | GAOP - 7f7 >50 | 90
Mortgage Loans on Real Estate
Total		63,498
Mortgage loans held-for-investment, net | GAOP - 7f7 >50 | Foreclosure
Mortgage Loans on Real Estate
Total		925
Mortgage loans held-for-investment, net | GAOP 7f7 Less Than 50
Mortgage Loans on Real Estate
Total		37,152
Mortgage loans held-for-investment, net | GAOP 7f7 Less Than 50 | Current
Mortgage Loans on Real Estate
Total		20,514
Mortgage loans held-for-investment, net | GAOP 7f7 Less Than 50 | 30
Mortgage Loans on Real Estate
Total		7,516
Mortgage loans held-for-investment, net | GAOP 7f7 Less Than 50 | 60
Mortgage Loans on Real Estate
Total		78
Mortgage loans held-for-investment, net | GAOP 7f7 Less Than 50 | 90
Mortgage Loans on Real Estate
Total		9,044
Mortgage loans held-for-investment, net | GAOP 7f7 Less Than 50 | Foreclosure
Mortgage Loans on Real Estate
Total		0
Mortgage loans held-for-investment, net | GAOP - 6f6 and below
Mortgage Loans on Real Estate
Total		87,314
Mortgage loans held-for-investment, net | GAOP - 6f6 and below | Current
Mortgage Loans on Real Estate
Total		8,565
Mortgage loans held-for-investment, net | GAOP - 6f6 and below | 30
Mortgage Loans on Real Estate
Total		6,906
Mortgage loans held-for-investment, net | GAOP - 6f6 and below | 60
Mortgage Loans on Real Estate
Total		421
Mortgage loans held-for-investment, net | GAOP - 6f6 and below | 90
Mortgage Loans on Real Estate
Total		45,058
Mortgage loans held-for-investment, net | GAOP - 6f6 and below | Foreclosure
Mortgage Loans on Real Estate
Total		26,364
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 Greater Than 50 [Member]
Mortgage Loans on Real Estate
Total		364,821
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 Greater Than 50 [Member] | Current
Mortgage Loans on Real Estate
Total		300,506
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 Greater Than 50 [Member] | 30
Mortgage Loans on Real Estate
Total		36,277
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 Greater Than 50 [Member] | 60
Mortgage Loans on Real Estate
Total		801
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 Greater Than 50 [Member] | 90
Mortgage Loans on Real Estate
Total		26,600
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 Greater Than 50 [Member] | Foreclosure
Mortgage Loans on Real Estate
Total		637
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 less than 50
Mortgage Loans on Real Estate
Total		31,611
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 less than 50 | Current
Mortgage Loans on Real Estate
Total		25,592
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 less than 50 | 30
Mortgage Loans on Real Estate
Total		3,846
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 less than 50 | 60
Mortgage Loans on Real Estate
Total		42
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 less than 50 | 90
Mortgage Loans on Real Estate
Total		2,131
Mortgage loans held-for-investment, net | Great AJAX REIT 7f7 less than 50 | Foreclosure
Mortgage Loans on Real Estate
Total		0
Mortgage loans held-for-investment, net | Great AJAX REIT 6f6 and Below [Member]
Mortgage Loans on Real Estate
Total		29,850
Mortgage loans held-for-investment, net | Great AJAX REIT 6f6 and Below [Member] | Current
Mortgage Loans on Real Estate
Total		4,374
Mortgage loans held-for-investment, net | Great AJAX REIT 6f6 and Below [Member] | 30
Mortgage Loans on Real Estate
Total		2,144
Mortgage loans held-for-investment, net | Great AJAX REIT 6f6 and Below [Member] | 60
Mortgage Loans on Real Estate
Total		0
Mortgage loans held-for-investment, net | Great AJAX REIT 6f6 and Below [Member] | 90
Mortgage Loans on Real Estate
Total		14,788
Mortgage loans held-for-investment, net | Great AJAX REIT 6f6 and Below [Member] | Foreclosure
Mortgage Loans on Real Estate
Total		8,544
Mortgage loans held-for-sale, net
Mortgage Loans on Real Estate
Total	31,315	55,718
Mortgage loans held-for-sale, net | Current
Mortgage Loans on Real Estate
Total	13,972	1,284
Mortgage loans held-for-sale, net | 30
Mortgage Loans on Real Estate
Total	4,635	592
Mortgage loans held-for-sale, net | 60
Mortgage Loans on Real Estate
Total	5	0
Mortgage loans held-for-sale, net | 90
Mortgage Loans on Real Estate
Total	8,914	26,243
Mortgage loans held-for-sale, net | Foreclosure
Mortgage Loans on Real Estate
Total	3,789	27,599
Mortgage loans held-for-sale, net | GAOP - 7f7 >50
Mortgage Loans on Real Estate
Total	31,315	55,718
Mortgage loans held-for-sale, net | GAOP - 7f7 >50 | Current
Mortgage Loans on Real Estate
Total	13,972	1,284
Mortgage loans held-for-sale, net | GAOP - 7f7 >50 | 30
Mortgage Loans on Real Estate
Total	4,635	592
Mortgage loans held-for-sale, net | GAOP - 7f7 >50 | 60
Mortgage Loans on Real Estate
Total	5	0
Mortgage loans held-for-sale, net | GAOP - 7f7 >50 | 90
Mortgage Loans on Real Estate
Total	8,914	26,243
Mortgage loans held-for-sale, net | GAOP - 7f7 >50 | Foreclosure
Mortgage Loans on Real Estate
Total	$ 3,789	$ 27,599

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Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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