Loans and Allowance for Credit Losses - Loans on Nonaccrual Status and Loans Past Due 90 Days or More and Still Accruing (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	$ 22,947	$ 19,052
End of Period Nonaccrual	31,889	22,947
Nonaccrual With No Related Allowance	4,406	10,516
Interest income recognized on nonaccrual	503	603
Commercial Loans \| Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	6,320	7,100
End of Period Nonaccrual	14,171	6,320
Nonaccrual With No Related Allowance	989	5,940
Interest income recognized on nonaccrual	91	46
Commercial Loans \| Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	878	283
End of Period Nonaccrual	3,302	878
Nonaccrual With No Related Allowance	386	0
Interest income recognized on nonaccrual	38	38
Commercial Loans \| Commercial construction
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	4,960	384
End of Period Nonaccrual	3,416	4,960
Nonaccrual With No Related Allowance	3,031	4,576
Interest income recognized on nonaccrual	0	0
Commercial Loans \| Business banking
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	4,147	4,490
End of Period Nonaccrual	3,903	4,147
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	83	209
Consumer Loans \| Consumer real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	6,312	6,526
End of Period Nonaccrual	6,833	6,312
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	289	308
Consumer Loans \| Other consumer
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	330	269
End of Period Nonaccrual	264	330
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	$ 2	$ 2

Amount of interest income on financing receivable on nonaccrual status.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
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-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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