Loans and Allowance for Credit Losses - Loan Modifications to Borrowers Experiencing Financial Difficulty (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($) payment	Jun. 30, 2023 USD ($) payment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 2,377	$ 4,639
% of Total Portfolio	0.02%	0.03%
Total Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 278
30-59 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		93
60-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		27
90 or More Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		158
Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		4,361
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 740	$ 1,600
% of Total Portfolio	0.01%	0.01%
Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 965	$ 1,313
% of Total Portfolio	0.01%	0.01%
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 340	$ 340
% of Total Portfolio	0.00%	0.00%
Combination - Interest Rate Reduction & Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 33	$ 269
% of Total Portfolio	0.00%	0.00%
Combination - Interest Rate Reduction & Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 71	$ 742
% of Total Portfolio	0.00%	0.01%
Combination - Term Extension & Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 143	$ 171
% of Total Portfolio	0.00%	0.00%
Combination - Interest Rate Reduction, Term Extension & Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 85	$ 204
% of Total Portfolio	0.00%	0.00%
Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 447	$ 1,155
% of Total Portfolio	0.04%	0.11%
Commercial Portfolio Segment | Business banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 1,155
Other-than-Insignificant Delay in Repayment | payment	1	10
Term Extension	4 years 3 months 18 days	4 years 3 months 18 days
Commercial Portfolio Segment | Business banking | Total Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 278
Commercial Portfolio Segment | Business banking | 30-59 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		93
Commercial Portfolio Segment | Business banking | 60-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		27
Commercial Portfolio Segment | Business banking | 90 or More Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		158
Commercial Portfolio Segment | Business banking | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 877
Commercial Portfolio Segment | Business banking | Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest Rate Reduction	11.30%	9.70%
Commercial Portfolio Segment | Business banking | Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest Rate Reduction	8.70%	7.20%
Commercial Portfolio Segment | Business banking | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 3	$ 50
% of Total Portfolio	0.00%	0.00%
Commercial Portfolio Segment | Business banking | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 340	$ 340
% of Total Portfolio	0.03%	0.03%
Commercial Portfolio Segment | Business banking | Combination - Interest Rate Reduction & Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 33	$ 94
% of Total Portfolio	0.00%	0.01%
Commercial Portfolio Segment | Business banking | Combination - Interest Rate Reduction & Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 71	$ 524
% of Total Portfolio	0.01%	0.05%
Commercial Portfolio Segment | Business banking | Combination - Term Extension & Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 0	$ 28
% of Total Portfolio	0.00%	0.00%
Commercial Portfolio Segment | Business banking | Combination - Interest Rate Reduction, Term Extension & Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 0	$ 119
% of Total Portfolio	0.00%	0.01%
Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 926	$ 1,252
% of Total Portfolio	0.04%	0.05%
Residential Real Estate | Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 1,252
Other-than-Insignificant Delay in Repayment | payment	11	10
Term Extension	23 years 8 months 12 days	23 years 8 months 12 days
Residential Real Estate | Residential real estate | Total Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 0
Residential Real Estate | Residential real estate | 30-59 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		0
Residential Real Estate | Residential real estate | 60-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		0
Residential Real Estate | Residential real estate | 90 or More Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		0
Residential Real Estate | Residential real estate | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 1,252
Residential Real Estate | Residential real estate | Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest Rate Reduction	5.40%	5.40%
Residential Real Estate | Residential real estate | Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest Rate Reduction	3.60%	3.60%
Residential Real Estate | Residential real estate | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 311	$ 311
% of Total Portfolio	0.01%	0.01%
Residential Real Estate | Residential real estate | Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 387	$ 713
% of Total Portfolio	0.02%	0.03%
Residential Real Estate | Residential real estate | Combination - Term Extension & Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 143	$ 143
% of Total Portfolio	0.01%	0.01%
Residential Real Estate | Residential real estate | Combination - Interest Rate Reduction, Term Extension & Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 85	$ 85
% of Total Portfolio	0.00%	0.00%
Consumer Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 1,004	$ 2,232
% of Total Portfolio	0.08%	0.19%
Consumer Portfolio Segment | Consumer home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 2,232
Other-than-Insignificant Delay in Repayment | payment	11	10
Term Extension		17 years 2 months 12 days
Consumer Portfolio Segment | Consumer home equity | Total Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 0
Consumer Portfolio Segment | Consumer home equity | 30-59 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		0
Consumer Portfolio Segment | Consumer home equity | 60-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		0
Consumer Portfolio Segment | Consumer home equity | 90 or More Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		0
Consumer Portfolio Segment | Consumer home equity | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance		$ 2,232
Consumer Portfolio Segment | Consumer home equity | Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest Rate Reduction	7.50%	7.10%
Consumer Portfolio Segment | Consumer home equity | Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest Rate Reduction	4.00%	4.30%
Consumer Portfolio Segment | Consumer home equity | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 426	$ 1,239
% of Total Portfolio	0.04%	0.10%
Consumer Portfolio Segment | Consumer home equity | Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 578	$ 600
% of Total Portfolio	0.05%	0.05%
Consumer Portfolio Segment | Consumer home equity | Combination - Interest Rate Reduction & Other-than-Insignificant Delay in Repayment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 0	$ 175
% of Total Portfolio	0.00%	0.01%
Consumer Portfolio Segment | Consumer home equity | Combination - Interest Rate Reduction & Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Balance	$ 0	$ 218
% of Total Portfolio	0.00%	0.02%