Loans - Loan Modifications Made to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
In % of the class of loans		0.10%
Months of payment delay		0 months
Months of term extension		0 months
Interest rate reduction		3.00%
Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
In % of the class of loans		1.80%
Months of payment delay		0 months
Months of term extension		34 months
Interest rate reduction		4.00%
Residential mortgage loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
In % of the class of loans	1.40%	0.60%
Months of payment delay	0 months	6 months
Months of term extension	7 months	31 months
Interest rate reduction	3.50%	3.10%
Term extension and interest rate reduction \| Residential mortgage loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 3,646	$ 3,823
Payments delay in # of months \| Commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		0
Payments delay in # of months \| Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		0
Payments delay in # of months \| Residential mortgage loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	750
Term extension \| Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		56
Term extension \| Residential mortgage loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	33,363	7,490
Interest rate reduction \| Commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		636
Interest rate reduction \| Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		782
Interest rate reduction \| Residential mortgage loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 7,409	$ 5,230

Financing Receivable, Modified, Weighted Average Deferral Payment from Modification

No definition available.

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- Definition

Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

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- Definition

Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

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-Topic 310
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-Paragraph 42
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

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- Definition

Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

+ References

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- Definition

Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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