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Mortgage Servicing Rights - Additional Information (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
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Sep. 30, 2023 | Dec. 31, 2022
Transfers and Servicing [Abstract] |  |
Unpaid principal balance of mortgage loans serviced for others, amount | $ 495.8 | $ 491.9
Fair value of servicing rights, weighted average discount rate | 8.00% | 8.10%
Fair value of servicing rights, weighted average constant prepayment rate | 6.40% | 6.30%

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- Definition Discount rate used to estimate the fair value of servicing assets and servicing liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-2 + Details
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- Definition Estimated rate of prepayments of principal on servicing assets and servicing liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-2 + Details
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- References No definition available. + Details
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- Definition Servicing asset at unpaid principal balance amount. + References No definition available. + Details
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