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Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Derivative Financial Instruments
Gain (loss) from changes in the fair value of derivatives	$ (1,300)	$ 4,700
Mortgage servicing rights	$ 9,660	8,131
Treasury futures
Derivative Financial Instruments
Derivative, maturity term	3 months
Derivative asset, treasury futures	$ 0		$ 1,600
Cash posted as collateral			1,600
Derivative, net liability positions			$ 100
Treasury futures | Other Income | Agency Business
Derivative Financial Instruments
Realized gain on derivatives	$ 800	500
Unrealized loss on derivatives		$ 1,700
Treasury futures | Minimum
Derivative Financial Instruments
Treasury futures rate period	5 years
Treasury futures | Maximum
Derivative Financial Instruments
Treasury futures rate period	10 years
Credit Default Swap
Derivative Financial Instruments
Derivative swap default credit	5 years

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Treasury Futures Rate Period

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Fair value, after effect of master netting arrangement, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Includes derivative subject to master netting arrangement not elected or qualified to offset. Excludes derivative not subject to master netting arrangement or similar agreement.

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Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

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Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of unrealized gain (loss) recognized in income for derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held.

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The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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