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Derivatives - Gain (loss) on Derivative Instruments , Net (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative [Line Items] |  |  |
(Loss) gain on derivative instruments, net | $ (32,905) | $ 436,007 | $ 81,417
Interest rate swaptions |  |  |
Derivative [Line Items] |  |  |
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments | 0 | 47,738 | 40,330
Put options on U.S. Treasury futures |  |  |
Derivative [Line Items] |  |  |
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments | 1,588 | (431) | (2,141)
Short position | U.S. Treasury futures |  |  |
Derivative [Line Items] |  |  |
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments | (12,430) | 724,347 | 61,215
Long position | TBA securities |  |  |
Derivative [Line Items] |  |  |
Gain (Loss) on Derivative Instruments Held for Trading Purposes, Net | $ (22,063) | $ (335,647) | $ (17,987)

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4CC + Details
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- Definition Aggregate net gain and losses (whether realized or unrealized) on all derivative instruments held for trading purposes whether or not settled physically. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480463/815-10-45-9 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4F -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4F + Details
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- Definition Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of interest rate derivatives not designated as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A + Details
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