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Collateralized Debt Obligations - Summary of Debt (Details) - Collateralized debt obligations - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |
Face amount |  | $ 1,547,963 | $ 16,284,974
Collateralized debt obligations, at fair value |  | 1,623,658 | 17,817,709
Consolidated SLST |  |  |
Debt Instrument [Line Items] |  |  |
Face amount |  | 975,017 | 1,040,135
Collateralized debt obligations, at fair value |  | $ 1,054,335 | $ 1,052,829
Weighted average interest rate (as a percent) |  | 2.75% | 2.75%
Weighted Average Rate of Notes Issued |  | 3.53% | 3.53%
Residential loan securitizations |  |  |
Debt Instrument [Line Items] |  |  |
Face amount |  | $ 557,497 | $ 40,621
Collateralized debt obligations, at fair value |  | $ 554,067 | $ 40,429
Weighted average interest rate (as a percent) |  | 3.36% | 2.41%
Weighted Average Rate of Notes Issued |  | 4.83% | 2.41%
Non-Agency RMBS Re-Securitization |  |  |
Debt Instrument [Line Items] |  |  |
Face amount |  | $ 15,449 |
Collateralized debt obligations, at fair value |  | $ 15,256 |
Non-Agency RMBS Re-Securitization | LIBOR |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, basis spread |  | 0.0525% |
Weighted Average Rate of Notes Issued, basis spread |  | 5.25% |
Non-Agency RMBS Re-Securitization | LIBOR | Subsequent Event | Forecast |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, basis spread | 7.75% |  |
Consolidated K-Series |  |  |
Debt Instrument [Line Items] |  |  |
Face amount |  |  | $ 15,204,218
Collateralized debt obligations, at fair value |  |  | $ 16,724,451
Weighted average interest rate (as a percent) |  |  | 4.12%
Weighted Average Rate of Notes Issued |  |  | 3.85%

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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