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Recent Accounting Pronouncements (Details) - USD ($)
$ in Thousands
Jan. 01, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL $ 22,962 $ 53,709 $ 22,602 $ 19,426
ACL on OBS credit exposure 360 2,900    
Retained earnings   296,941 288,653  
Total Accruing Loans and Leases   $ 3,634,411 $ 3,693,562  
Loans and Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 22,602      
Total Accruing Loans and Leases 3,689,313      
Loans and Leases | Commercial Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 10,434      
Total Accruing Loans and Leases 1,913,430      
Loans and Leases | CRE - nonowner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Loans and Leases | CRE - owner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Loans and Leases | Home equity lines of credit        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 890      
Total Accruing Loans and Leases 194,639      
Loans and Leases | Residential Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 1,538      
Total Accruing Loans and Leases 489,903      
Loans and Leases | Residential mortgage - first liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Loans and Leases | Residential mortgage - junior liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Loans and Leases | Construction        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 997      
Total Accruing Loans and Leases 159,867      
Loans and Leases | Commercial & Industrial        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 6,029      
Total Accruing Loans and Leases 709,257      
Loans and Leases | Consumer        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 353      
Total Accruing Loans and Leases 57,139      
Loans and Leases | Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 2,361      
Total Accruing Loans and Leases 165,078      
Reclassification to CECL Portfolio Segmentation        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
ACL on OBS credit exposure 0      
Reclassification to CECL Portfolio Segmentation | Loans and Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | Commercial Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL (10,434)      
Total Accruing Loans and Leases (1,913,430)      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | CRE - nonowner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 7,960      
Total Accruing Loans and Leases 1,337,167      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | CRE - owner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 2,825      
Total Accruing Loans and Leases 527,607      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | Home equity lines of credit        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 224      
Total Accruing Loans and Leases 29,623      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | Residential Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL (1,538)      
Total Accruing Loans and Leases (489,903)      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | Residential mortgage - first liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 2,501      
Total Accruing Loans and Leases 706,690      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | Residential mortgage - junior liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 338      
Total Accruing Loans and Leases 36,843      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | Construction        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 233      
Total Accruing Loans and Leases 42,331      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | Commercial & Industrial        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL (2,194)      
Total Accruing Loans and Leases (277,030)      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | Consumer        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 85      
Total Accruing Loans and Leases 102      
Reclassification to CECL Portfolio Segmentation | Loans and Leases | Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Pre-CECL Adoption Portfolio Segmentation        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 22,962      
ACL on OBS credit exposure 360      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 22,602      
Total Accruing Loans and Leases 3,689,313      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | Commercial Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | CRE - nonowner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 7,960      
Total Accruing Loans and Leases 1,337,167      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | CRE - owner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 2,825      
Total Accruing Loans and Leases 527,607      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | Home equity lines of credit        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 1,114      
Total Accruing Loans and Leases 224,262      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | Residential Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | Residential mortgage - first liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 2,501      
Total Accruing Loans and Leases 706,690      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | Residential mortgage - junior liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 338      
Total Accruing Loans and Leases 36,843      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | Construction        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 1,230      
Total Accruing Loans and Leases 202,198      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | Commercial & Industrial        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 3,835      
Total Accruing Loans and Leases 432,227      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | Consumer        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 438      
Total Accruing Loans and Leases 57,241      
Pre-CECL Adoption Portfolio Segmentation | Loans and Leases | Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 2,361      
Total Accruing Loans and Leases 165,078      
Post-CECL Adoption Portfolio Segmentation        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 26,989      
ACL on OBS credit exposure 1,181      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 25,808      
Total Accruing Loans and Leases 3,689,794      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | Commercial Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | CRE - nonowner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 7,493      
Total Accruing Loans and Leases 1,337,464      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | CRE - owner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 2,841      
Total Accruing Loans and Leases 527,607      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | Home equity lines of credit        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 1,068      
Total Accruing Loans and Leases 224,262      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | Residential Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | Residential mortgage - first liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 4,909      
Total Accruing Loans and Leases 706,843      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | Residential mortgage - junior liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 417      
Total Accruing Loans and Leases 36,843      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | Construction        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 871      
Total Accruing Loans and Leases 202,198      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | Commercial & Industrial        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 3,676      
Total Accruing Loans and Leases 432,248      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | Consumer        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 578      
Total Accruing Loans and Leases 57,241      
Post-CECL Adoption Portfolio Segmentation | Loans and Leases | Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 3,955      
Total Accruing Loans and Leases 165,088      
Cumulative Effect, Period of Adoption, Adjustment        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL $ 4,027      
Allowance for credit loss (as a percent) 17.50%      
ACL on OBS credit exposure $ 821      
Retained earnings 2,801      
Balance sheet reclassification (481)      
Total pre-tax impact 3,546      
Tax effect (745)      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 3,206      
Total Accruing Loans and Leases 481      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | Commercial Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | CRE - nonowner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL (467)      
Total Accruing Loans and Leases 297      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | CRE - owner-occupied        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 16      
Total Accruing Loans and Leases 0      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | Home equity lines of credit        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL (46)      
Total Accruing Loans and Leases 0      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | Residential Mortgage        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 0      
Total Accruing Loans and Leases 0      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | Residential mortgage - first liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 2,408      
Total Accruing Loans and Leases 153      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | Residential mortgage - junior liens        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 79      
Total Accruing Loans and Leases 0      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | Construction        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL (359)      
Total Accruing Loans and Leases 0      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | Commercial & Industrial        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL (159)      
Total Accruing Loans and Leases 21      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | Consumer        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 140      
Total Accruing Loans and Leases 0      
Cumulative Effect, Period of Adoption, Adjustment | Loans and Leases | Leases        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase in ACL 1,594      
Total Accruing Loans and Leases $ 10