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Fair Value of Financial Instruments - Difference Between Fair Value and Unpaid Principal Balance (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 23,660,000	$ 31,757,000
Principal Balance/Amortized Cost	23,290,000	32,046,000
Difference	370,000	(289,000)
Nonaccrual mortgage loans held for sale recorded at fair value	0	3,900,000
Loans held for sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	16,852,000	25,389,000
Principal Balance/Amortized Cost	16,475,000	24,946,000
Difference	377,000	443,000
Securities carried at fair value through income
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	6,808,000	6,368,000
Principal Balance/Amortized Cost	6,815,000	7,100,000
Difference	$ (7,000)	(732,000)
U.S. government agency securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans, 90 days or more past due		$ 3,300,000

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- Definition

This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
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-Publisher FASB
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This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.

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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
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Fair value portion of mortgage loans held-for-sale.

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