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Derivatives Volume of Activity (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($)
Not Designated as Hedging Instrument, Economic Hedge | U.S. Treasury futures | Short position |
Derivatives [Roll Forward] |
Derivative, Notional Amount | $ 4,920,000
Derivative, Notional Amount, Derivative Instruments Added | 21,750,000
Derivative, Notional Amount, Derivative Instruments Maturing, Settled, Terminated, or Paired-Off | (21,790,000)
Derivative, Notional Amount | 4,880,000
Not Designated as Hedging Instrument, Economic Hedge | Put options on U.S. Treasury futures |
Derivatives [Roll Forward] |
Derivative, Notional Amount | 250,000
Derivative, Notional Amount, Derivative Instruments Added | 600,000
Derivative, Notional Amount, Derivative Instruments Maturing, Settled, Terminated, or Paired-Off | (850,000)
Derivative, Notional Amount | 0
Not Designated as Hedging Instrument, Trading | TBA securities | Long position |
Derivatives [Roll Forward] |
Derivative, Notional Amount | 2,869,000
Derivative, Notional Amount, Derivative Instruments Added | 28,231,000
Derivative, Notional Amount, Derivative Instruments Maturing, Settled, Terminated, or Paired-Off | (29,697,000)
Derivative, Notional Amount | $ 1,403,000

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