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Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Derivative Financial Instruments
Gain (loss) from changes in the fair value of derivatives	$ 1,200	$ (1,000)	$ 900	$ (2,000)
Mortgage servicing rights	13,195	14,109	$ 37,928	48,769
Treasury futures
Derivative Financial Instruments
Derivative, maturity term			3 months
Derivative asset, treasury futures	1,600		$ 1,600		$ 1,500
Cash posted as collateral	1,600		1,600		1,900
Derivative, net liability positions	100		100		$ 400
Treasury futures | Other Income | Agency Business
Derivative Financial Instruments
Realized gain (loss) on derivatives	200	400	(300)	1,500
Unrealized (losses) gains on derivatives	$ (100)	$ 200	$ 300	$ (3,000)
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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Term of derivative swap credit.

+ References

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Amount of revenue recorded for the mortgage servicing rights obtained from sold loans.

+ References

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Treasury Futures Rate Period

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- Definition

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.

+ References

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- Definition

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

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- Definition

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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- Definition

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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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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- Definition

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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- Definition

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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