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Fair Value of Assets and Liabilities - Summary of the Significant Unobservable Inputs (Details) - Significant Other Unobservable Inputs (Level 3) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
Discounted Cash Flow Technique | Weighted average Discount Rate (as a percent) |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Mortgage Servicing Rights, Fair Value Inputs | 0.0928 | 0.0948
Discounted Cash Flow Technique | Mortgage Servicing Rights |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Mortgage Servicing Rights, at Fair Value | $ 25,925 | $ 26,851
Discounted Cash Flow Technique | Mortgage Servicing Rights | Weighted Average Constant Prepayment Rate (as a Percent) |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Mortgage Servicing Rights, Fair Value Inputs | 0.042 | 0.0406
Pricing Model | Interest Rate Lock Commitments |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net | $ 152 | $ 148
Pricing Model | Weighted Average Closing Ratio (as a percent) | Interest Rate Lock Commitments |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs | 0.9147 | 0.8553
Minimum | Discounted Cash Flow Technique | Measurement Input, Discount Rate |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Mortgage Servicing Rights, Fair Value Inputs | 0.0864 | 0.0765
Minimum | Discounted Cash Flow Technique | Mortgage Servicing Rights |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Fair Value Assumption, Date of Securitization or Asset-Backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities, Prepayment Speed | 3.10% | 2.98%
Minimum | Pricing Model | Weighted Average Closing Ratio (as a percent) | Interest Rate Lock Commitments |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs | 0.754 | 0.835
Maximum | Discounted Cash Flow Technique | Measurement Input, Discount Rate |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Mortgage Servicing Rights, Fair Value Inputs | 0.1044 | 0.1079
Maximum | Discounted Cash Flow Technique | Mortgage Servicing Rights |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Fair Value Assumption, Date of Securitization or Asset-Backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities, Prepayment Speed | 17.61% | 21.18%
Maximum | Pricing Model | Weighted Average Closing Ratio (as a percent) | Interest Rate Lock Commitments |  |
Level3 Assets And Liabilities Fair Value And Fair Value Unobservable Inputs [Line Items] |  |
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Fair Value Inputs | 0.99 | 0.99

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- Definition This element represents the assets reported on a recurring or nonrecurring basis on the balance sheet at period end at fair value. + References No definition available. + Details
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- Definition Estimated rate of prepayment of principal on financial assets for initial fair value measurement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-3 + Details
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- Definition Value of input used to measure net derivative asset (liability). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Fair value as of the balance sheet date of all derivatives not designated as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 5 -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480463/815-10-45-5 + Details
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