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Derivatives - Gain (loss) on Derivative Instruments , Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Derivative [Line Items] |  |  |  |
Gain on derivative instruments, net | $ 96,947 | $ 9,603 | $ 423,570 | $ 64,463
Realized gain (loss) on derivative | 149,600 | (71,708) | 485,960 | 15,962
Interest rate swaptions |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments | (4,202) | 3,985 | 47,738 | 42,686
Options on U.S. Treasury futures |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments | 630 | (3,226) | 630 | (2,141)
Short position | U.S. Treasury futures |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments | 281,827 | 11,209 | 721,236 | 43,673
Long position | TBA securities |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) on Derivative Instruments Held for Trading Purposes, Net | $ (181,308) | $ (2,365) | $ (346,034) | $ (19,755)

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4F -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624186-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=126966630&loc=d3e41322-113958 + Details
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