Loans and the Allowance for Credit Losses - Loans Outstanding by Category (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Loans And Leases Receivable Disclosure [Line Items]
Total loans	$ 4,025,226	$ 4,062,856
Residential Mortgage
Loans And Leases Receivable Disclosure [Line Items]
Deferred costs (fees) net of unearned fees	4,911	6,613
Total loans	1,617,194	1,648,838
Residential Mortgage | Construction
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	41,445	35,299
Residential Mortgage | Mortgages - Fixed Rate
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	805,220	902,968
Residential Mortgage | Mortgages - Adjustable Rate
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	765,618	703,958
Commercial Mortgage
Loans And Leases Receivable Disclosure [Line Items]
Deferred costs (fees) net of unearned fees	2,275	2,318
Total loans	1,916,159	1,914,423
Commercial Mortgage | Construction
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	110,971	135,782
Commercial Mortgage | Mortgages - Non-owner Occupied
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	1,634,435	1,592,732
Commercial Mortgage | Mortgages - Owner Occupied
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	168,478	183,591
Home Equity
Loans And Leases Receivable Disclosure [Line Items]
Deferred costs (fees) net of unearned fees	258	292
Total loans	95,975	111,351
Home Equity | Home Equity - Lines of Credit
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	92,561	108,961
Home Equity | Home Equity - Term Loans
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	3,156	2,098
Commercial and Industrial
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	366,116	349,026
Unearned fees, net of deferred costs	446	240
Total loans	367,403	350,650
Commercial and Industrial | Paycheck Protection Program Loans
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	841	1,384
Consumer
Loans And Leases Receivable Disclosure [Line Items]
Deferred costs (fees) net of unearned fees	16	18
Total loans	28,495	37,594
Consumer | Secured
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	26,734	35,679
Consumer | Unsecured
Loans And Leases Receivable Disclosure [Line Items]
Loans outstanding by category gross	$ 1,745	$ 1,897