Loans and Allowance for Credit Losses - Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 58,483	$ 58,478	$ 57,910	$ 57,351	$ 57,351
Charge-offs	(2,074)	(1,379)	(3,587)	(2,996)
Recoveries	249	91	559	257
Provisions	2,896	1,479	4,672	4,057
Ending Balance	59,554	58,669	59,554	58,669	57,910
Commercial real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	21,662	22,984	22,846	23,015	23,015
Charge-offs	(109)	0	(109)	0	0
Recoveries	0	0	78	0
Provisions	(484)	115	(1,746)	84
Ending Balance	21,069	23,099	21,069	23,099	22,846
Residential real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	21,720	20,500	21,776	19,909	19,909
Charge-offs	(49)	0	(49)	(1)	(1)
Recoveries	190	1	193	5
Provisions	949	1,206	890	1,794
Ending Balance	22,810	21,707	22,810	21,707	21,776
Construction
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	5,805	3,471	2,854	3,935	3,935
Charge-offs	0	0	0	(12)	(12)
Recoveries	0	1	1	7
Provisions	416	(578)	3,366	(1,036)
Ending Balance	6,221	2,894	6,221	2,894	2,854
Commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,870	2,866	3,138	2,671	2,671
Charge-offs	(440)	(154)	(442)	(177)	(190)
Recoveries	5	1	92	4
Provisions	1,207	512	854	727
Ending Balance	3,642	3,225	3,642	3,225	3,138
Consumer
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	6,188	8,145	6,889	7,601	7,601
Charge-offs	(1,382)	(1,015)	(2,462)	(2,401)	(3,646)
Recoveries	54	88	195	232
Provisions	842	36	1,080	1,822
Ending Balance	5,702	7,254	5,702	7,254	6,889
Credit cards
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	238	512	407	220	220
Charge-offs	(94)	(210)	(525)	(405)	(584)
Recoveries	0	0	0	9
Provisions	(34)	188	228	666
Ending Balance	$ 110	$ 490	$ 110	$ 490	$ 407

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

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