Derivative Financial Instruments - Derivative Instruments Presented on the Balance Sheet and Notional Amounts (Details) $ in Thousands	Jun. 30, 2022 USD ($) contract	Dec. 31, 2021 USD ($) contract
Derivative [Line Items]
Assets	$ 594	$ 2,428
Derivatives Not Designated as Hedging Instruments \| Interest rate futures
Derivative [Line Items]
Number of Contracts \| contract	12,902	10,438
Assets	$ 594	$ 0
Liabilities	0	(728)
Derivatives Not Designated as Hedging Instruments \| TBAs
Derivative [Line Items]
Assets	0	2,428
Liabilities	(8,258)	0
Derivatives Not Designated as Hedging Instruments \| Long Exposure \| Interest rate futures
Derivative [Line Items]
Notional Amounts	0	0
Derivatives Not Designated as Hedging Instruments \| Long Exposure \| TBAs
Derivative [Line Items]
Notional Amounts	0	0
Derivatives Not Designated as Hedging Instruments \| Short Exposure \| Interest rate futures
Derivative [Line Items]
Notional Amounts	1,290,200	1,043,800
Derivatives Not Designated as Hedging Instruments \| Short Exposure \| TBAs
Derivative [Line Items]
Notional Amounts	$ 876,000	$ 523,938

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Nominal or face amount used to calculate payment on derivative.

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The number of derivative instruments of a particular group held by the entity.

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