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Real Estate Securities - Changes of Unamortized Discount and Designated Credit Reserves on Residential Available for Sale Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2023
Credit Reserve |  |
Beginning balance | $ 2,639 | $ 2,540
Sales, calls, other | 131 | 308
Ending Balance | 2,573 | 2,573
Unamortized Discount, Net |  |
Beginning balance |  | 61,650
Ending Balance | 46,603 | 46,603
Residential |  |
Credit Reserve |  |
Beginning balance | 25,615 | 28,739
Amortization of net discount | 0 | 0
Realized credit recoveries (losses), net | 101 | 106
Acquisitions | 0 | 1,106
Sales, calls, other | (1,207) | (5,331)
Transfers to (release of) credit reserves, net | (619) | (730)
Ending Balance | 23,890 | 23,890
Unamortized Discount, Net |  |
Beginning balance | 46,948 | 61,650
Amortization of net discount | (296) | (946)
Realized credit recoveries (losses), net | 0 | 0
Acquisitions | 0 | 754
Sales, calls, other | (668) | (15,585)
Transfers to (release of) credit reserves, net | 619 | 730
Ending Balance | $ 46,603 | $ 46,603

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- Definition Changes to the net unamortized discount on available-for-sale securities due to realized credit losses. + References No definition available. + Details
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- Definition Transfers to or releases of the credit reserve on available-for-sale securities. + References No definition available. + Details
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- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-9 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-9 + Details
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