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Derivatives and Hedging Activities - Nondesignated Hedges (Details) - Nondesignated Hedges | 12 Months Ended
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Dec. 31, 2022 USD ($) contract loan | Dec. 31, 2021 USD ($) contract loan | Dec. 31, 2020 USD ($)
Derivatives and Hedging Activities |  |  |
Gains (losses) on fair value hedges recognized in earnings | $ | $ 321,000 | $ 312,000 | $ (264,000)
Commercial customers |  |  |
Derivatives and Hedging Activities |  |  |
Notional amount of derivatives | $ | 107,000,000.0 | $ 93,900,000 |
Interest rate contract | Third parties |  |  |
Derivatives and Hedging Activities |  |  |
Notional amount of derivatives | $ | $ 93,900,000 |  |
Interest rate swap |  |  |
Derivatives and Hedging Activities |  |  |
Number of participation loans purchased | loan | 1 | 4 |
Participating mortgage loans, mortgage obligations amount | $ | $ 8,800,000 | $ 27,200,000 |
Interest rate swap | Third parties |  |  |
Derivatives and Hedging Activities |  |  |
Number of interest rate derivatives held | contract | 6 | 11 |
Interest rate swap | Commercial customers |  |  |
Derivatives and Hedging Activities |  |  |
Number of interest rate derivatives held | contract | 6 | 11 |
Interest rate cap | Third parties |  |  |
Derivatives and Hedging Activities |  |  |
Number of interest rate derivatives held | contract | 1 | 1 |
Interest rate cap | Commercial customers |  |  |
Derivatives and Hedging Activities |  |  |
Number of interest rate derivatives held | contract | 1 | 1 |

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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
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- Definition Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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- Definition The aggregate amount of the participating mortgage obligation at the end of the accounting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=99377297&loc=d3e10013-112621 + Details
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