Allowance for Credit Losses - Modifications to Debtors Experiencing Financial Difficulty (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) loan modification	Jun. 30, 2023 USD ($) loan modification	Jun. 30, 2024 USD ($) loan modification	Jun. 30, 2023 USD ($) loan modification
Accruing Modified Loans to Borrowers Experiencing Financial Difficulty:
Number of Loans | loan	3	1	8	1
Amortized Cost Basis	$ 1,402	$ 3,233	$ 3,311	$ 3,233
Related Reserve	$ 0	$ 0	$ 0	$ 0
Nonaccrual Modified Loans to Borrowers Experiencing Financial Difficulty:
Number of Loans | loan	5	1	10	1
Amortized Cost Basis	$ 2,800	$ 1,406	$ 5,634	$ 1,406
Related Reserve	$ 15	$ 422	$ 1,024	$ 422
Modifications granted to borrowers | modification	8	2	11	2
Number of loans defaulted during the period | loan	1	0	1	0
Small business loans
Accruing Modified Loans to Borrowers Experiencing Financial Difficulty:
Number of Loans | loan			3	0
Amortized Cost Basis			$ 719	$ 0
Percentage of Total Class of Financing Receivable (as a percent)			0.50%	0.00%
Related Reserve			$ 0	$ 0
Nonaccrual Modified Loans to Borrowers Experiencing Financial Difficulty:
Number of Loans | loan	1	1	6
Amortized Cost Basis	$ 1,195	$ 0	$ 4,029	$ 0
Percentage of Total Class of Financing Receivable (as a percent)	0.008	0	0.027	0
Related Reserve	$ 15	$ 0	$ 1,024	$ 0
Commercial and industrial
Accruing Modified Loans to Borrowers Experiencing Financial Difficulty:
Number of Loans | loan	3	1	5	1
Amortized Cost Basis	$ 1,402	$ 3,233	$ 2,592	$ 3,233
Percentage of Total Class of Financing Receivable (as a percent)	0.40%	1.00%	0.70%	1.00%
Related Reserve	$ 0	$ 0	$ 0	$ 0
Nonaccrual Modified Loans to Borrowers Experiencing Financial Difficulty:
Number of Loans | loan	4	1	4	1
Amortized Cost Basis	$ 1,605	$ 1,406	$ 1,605	$ 1,406
Percentage of Total Class of Financing Receivable (as a percent)	0.005	0.005	0.005	0.005
Related Reserve	$ 0	$ 422	$ 0	$ 422