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Allowance for Loan and Lease Losses - Recorded Investment on Impaired Loans (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Originated Loans and Leases    
Financing Receivable, Impaired [Line Items]    
Recorded investment with no related allowance $ 15,849 $ 7,303
Unpaid principal balance with no related allowance 16,974 7,844
Recorded investment with related allowance 3,536 6,864
Unpaid principal balance with related allowance 3,536 6,864
Related Allowance 907 3,762
Recorded investment 19,385 14,167
Unpaid principal balance 20,510 14,708
Originated Loans and Leases | Commercial and industrial | Other    
Financing Receivable, Impaired [Line Items]    
Recorded investment with no related allowance 1,865 183
Unpaid principal balance with no related allowance 1,965 271
Recorded investment with related allowance 245 5,183
Unpaid principal balance with related allowance 245 5,183
Related Allowance 245 3,365
Originated Loans and Leases | Commercial real estate | Other    
Financing Receivable, Impaired [Line Items]    
Recorded investment with no related allowance 10,205 3,205
Unpaid principal balance with no related allowance 11,017 3,405
Recorded investment with related allowance 3,291 1,681
Unpaid principal balance with related allowance 3,291 1,681
Related Allowance 662 397
Originated Loans and Leases | Residential real estate | Home equity    
Financing Receivable, Impaired [Line Items]    
Recorded investment with no related allowance 3,779 3,915
Unpaid principal balance with no related allowance 3,992 4,168
Acquired Loans and Leases    
Financing Receivable, Impaired [Line Items]    
Recorded investment 2,830 3,438
Unpaid principal balance 2,933 3,652
Acquired Loans and Leases | Commercial and industrial | Other    
Financing Receivable, Impaired [Line Items]    
Recorded investment with no related allowance 2 32
Unpaid principal balance with no related allowance 2 32
Acquired Loans and Leases | Commercial real estate | Other    
Financing Receivable, Impaired [Line Items]    
Recorded investment with no related allowance 714 842
Unpaid principal balance with no related allowance 714 924
Acquired Loans and Leases | Residential real estate | Home equity    
Financing Receivable, Impaired [Line Items]    
Recorded investment with no related allowance 2,114 2,564
Unpaid principal balance with no related allowance $ 2,217 $ 2,696