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Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Derivative Financial Instruments
Gain from changes in the fair value of derivatives	$ 100	$ 7,100
Mortgage servicing rights	$ 10,199	18,458
Treasury futures
Derivative Financial Instruments
Derivative, maturity term	3 months
Derivative asset, treasury futures	$ 1,800		$ 1,500
Cash posted as collateral	1,800		1,900
Unrealized (losses) gains on derivatives	(100)		$ (400)
Treasury futures | Other Income | Agency Business
Derivative Financial Instruments
Unrealized (losses) gains on derivatives	400	(4,400)
Realized gain (loss) on derivatives	$ (100)	$ 1,600
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

X

- Definition

Term of derivative swap credit.

+ References

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- Definition

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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X

- 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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- Definition

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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