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Fair Value Measurements - Inputs Used to Determine Fair Values of Oreo are Considered Level 3 Inputs in Fair Value Hierarchy (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total assets at fair value | $ 59,227 | $ 33,332
Losses from fair value changes | (1,517) | (1,796)
Impaired loans [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total assets at fair value | 42,642 | 20,504
Losses from fair value changes | (1,218) | (1,338)
Other Real Estate Owned [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total assets at fair value | 3,416 | 3,695
Losses from fair value changes | (55) | (452)
Mortgage Servicing Rights [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total assets at fair value |  | 9,133
Losses from fair value changes |  | $ (6)
Premise And Equipment [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total assets at fair value | 13,169 |
Losses from fair value changes | $ (244) |

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