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Schedule of Mortgage-Backed Securities by Weighted Average Life (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) | [1] | $ 893,301 | $ 1,311,361
Non-Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | 20,704 | 11,854
Amortized Cost |  | $ 18,703 | $ 9,918
Weighted Average Coupon Rate, Percent |  | 0.36% | 0.30%
Less than three years [Member] | Non-Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 2,099 | $ 561
Amortized Cost |  | $ 2,092 | $ 457
Weighted Average Coupon Rate, Percent |  | 5.67% | 6.00%
Greater than three years and less than seven years [Member] | Non-Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 1,889 | $ 1,773
Amortized Cost |  | $ 1,763 | $ 1,571
Weighted Average Coupon Rate, Percent |  | 4.67% | 0.35%
Greater than seven years and less than eleven years [Member] | Non-Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 16,049 | $ 9,520
Amortized Cost |  | $ 14,848 | $ 7,890
Weighted Average Coupon Rate, Percent |  | 0.32% | 0.25%
Greater than eleven years [Member] | Non-Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 667 | $ 0
Amortized Cost |  | $ 0 | $ 0
Weighted Average Coupon Rate, Percent |  | 4.71% | 0.00%
Fixed Rate [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 863,284 | $ 1,289,218
Amortized Cost |  | $ 938,829 | $ 1,283,343
Weighted Average Coupon Rate, Percent |  | 3.63% | 2.99%
Fixed Rate [Member] | Less than three years [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 17,005 | $ 28,443
Amortized Cost |  | $ 17,868 | $ 28,273
Weighted Average Coupon Rate, Percent |  | 3.80% | 3.75%
Fixed Rate [Member] | Greater than three years and less than seven years [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 204,858 | $ 724,996
Amortized Cost |  | $ 221,291 | $ 718,318
Weighted Average Coupon Rate, Percent |  | 4.10% | 3.53%
Fixed Rate [Member] | Greater than seven years and less than eleven years [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 640,207 | $ 280,147
Amortized Cost |  | $ 698,391 | $ 281,786
Weighted Average Coupon Rate, Percent |  | 3.48% | 2.50%
Fixed Rate [Member] | Greater than eleven years [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 1,214 | $ 255,632
Amortized Cost |  | $ 1,279 | $ 254,966
Weighted Average Coupon Rate, Percent |  | 4.50% | 2.00%
Interest-Only [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 9,313 | $ 10,289
Amortized Cost |  | $ 9,212 | $ 12,983
Weighted Average Coupon Rate, Percent |  | 3.89% | 3.36%
Interest-Only [Member] | Non-Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 8,138 | $ 2,798
Amortized Cost |  | $ 6,289 | $ 2,684
Weighted Average Coupon Rate, Percent |  | 0.24% | 0.27%
Interest-Only [Member] | Less than three years [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 797 | $ 1,628
Amortized Cost |  | $ 882 | $ 2,027
Weighted Average Coupon Rate, Percent |  | 4.03% | 2.10%
Interest-Only [Member] | Greater than three years and less than seven years [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 3,937 | $ 7,820
Amortized Cost |  | $ 3,827 | $ 10,095
Weighted Average Coupon Rate, Percent |  | 4.13% | 4.38%
Interest-Only [Member] | Greater than seven years and less than eleven years [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 4,579 | $ 841
Amortized Cost |  | $ 4,503 | $ 861
Weighted Average Coupon Rate, Percent |  | 3.61% | 2.39%
Interest-Only [Member] | Greater than eleven years [Member] | Agency RMBS [Member] |  |  |
Mortgage-Backed Securities [Line Items] |  |  |
Mortgage-backed securities, at fair value(1) |  | $ 0 | $ 0
Amortized Cost |  | $ 0 | $ 0
Weighted Average Coupon Rate, Percent |  | 0.00% | 0.00%
[1] | Includes assets pledged as collateral to counterparties. See Note 6 for additional details on the Company's borrowings and related collateral.

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- Definition The fair value as of the balance sheet date of firm holdings in mortgages, mortgage backed securities (investment instruments that represent ownership of an undivided interest in a group of mortgages, where principal and interest from the individual mortgages are used to pay investors' principal and interest on the mortgage backed security) and asset-backed securities that are primarily paid from the cash flows of a discrete pool of receivables or other financial assets (such as credit-card receivables), either fixed or revolving, that by their terms convert into cash within a finite time period. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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