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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, 2020 | Sep. 30, 2020
Credit Reserve |  |
Beginning balance | $ 1,471 | $ 0
Sales, calls, other | 0 | 0
Ending Balance | 1,027 | 1,027
Unamortized Discount, Net |  |
Beginning balance |  | 124,255
Ending Balance | 99,221 | 99,221
Residential |  |
Credit Reserve |  |
Beginning balance | 37,785 | 32,940
Amortization of net discount | 0 | 0
Realized credit losses | (194) | (897)
Acquisitions | 1,303 | 6,487
Sales, calls, other | 0 | (726)
(Release of) transfers to credit reserves, net | 4,292 | 5,382
Ending Balance | 43,186 | 43,186
Unamortized Discount, Net |  |
Beginning balance | 104,260 | 124,255
Amortization of net discount | (1,766) | (4,607)
Realized credit losses | 0 | 0
Acquisitions | 1,019 | 1,796
Sales, calls, other | 0 | (16,841)
(Release of) transfers to credit reserves, net | (4,292) | (5,382)
Ending Balance | $ 99,221 | $ 99,221

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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 Changes to the net unamortized discount on available-for-sale securities due to sales, calls, and other items. + 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 Changes to the credit reserve on available-for-sale securities due to realized credit losses. + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 + Details
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- Definition Amount of decrease in 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) from sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455 + Details
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