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Fair Value of Assets and Liabilities - Additional Information (Details) - USD ($) | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Allowance for Credit Losses | $ 68,774,000 | $ 68,241,000 | $ 68,675,000 | $ 68,312,000 | $ 58,719,000 | $ 59,093,000
Other real estate owned | 1,832,000 |  | 1,163,000 |  |  |
Mortgage Servicing Rights |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Finite-lived intangible assets, net | 5,835,000 | 7,224,000 | 6,859,000 |  |  | $ 331,000
Mortgage servicing rights (MSR) impairment (recovery) | (77,000) | $ 0 | $ (8,000) |  |  |
Fair Value, Nonrecurring |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Carrying amount of loans with a specific allowance | 594,000 |  |  |  |  |
Fair value of loans with a specific allowance | 579,000 |  |  |  |  |
Allowance for Credit Losses | 15,000 |  |  |  |  |
Fair Value, Nonrecurring | Carrying Amount |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Other real estate owned | 1,800,000 |  |  |  |  |
Fair Value, Nonrecurring | Fair Value |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Other real estate owned | $ 47,000 |  |  |  |  |

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