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Allowance for Loan and Lease Losses (Details 3) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Originated Loans and Leases    
Financing Receivable, Impaired [Line Items]    
Recorded Investment With No Related Allowance $ 10,598 $ 10,762
Unpaid Principal Balance With No Related Allowance 11,294 11,168
Recorded Investment With Related Allowance 1,208 2,192
Unpaid Principal Balance With Related Allowance 1,208 2,318
Related Allowance 293 417
Recorded Investment 11,806 12,954
Unpaid Principal Balance 12,502 13,486
Originated Loans and Leases | Commercial and industrial other    
Financing Receivable, Impaired [Line Items]    
Recorded Investment With No Related Allowance 375 276
Unpaid Principal Balance With No Related Allowance 399 370
Recorded Investment With Related Allowance 1,208 359
Unpaid Principal Balance With Related Allowance 1,208 276
Related Allowance 293 95
Originated Loans and Leases | Commercial real estate other    
Financing Receivable, Impaired [Line Items]    
Recorded Investment With No Related Allowance 6,523 6,979
Unpaid Principal Balance With No Related Allowance 7,048 7,263
Recorded Investment With Related Allowance 0 1,833
Unpaid Principal Balance With Related Allowance 0 2,042
Related Allowance 0 322
Originated Loans and Leases | Residential real estate - Home equity    
Financing Receivable, Impaired [Line Items]    
Recorded Investment With No Related Allowance 3,700 3,507
Unpaid Principal Balance With No Related Allowance 3,847 3,535
Total Acquired Loans    
Financing Receivable, Impaired [Line Items]    
Recorded Investment With No Related Allowance 2,703 5,547
Unpaid Principal Balance With No Related Allowance 2,824 6,230
Recorded Investment With Related Allowance 367 78
Unpaid Principal Balance With Related Allowance 367 78
Related Allowance 125 76
Recorded Investment 3,070 5,625
Unpaid Principal Balance 3,191 6,308
Total Acquired Loans | Commercial and industrial other    
Financing Receivable, Impaired [Line Items]    
Recorded Investment With No Related Allowance 2 172
Unpaid Principal Balance With No Related Allowance 2 472
Recorded Investment With Related Allowance 100 0
Unpaid Principal Balance With Related Allowance 100 0
Related Allowance 50 0
Total Acquired Loans | Commercial real estate other    
Financing Receivable, Impaired [Line Items]    
Recorded Investment With No Related Allowance 1,187 4,003
Unpaid Principal Balance With No Related Allowance 1,369 4,386
Recorded Investment With Related Allowance 267 78
Unpaid Principal Balance With Related Allowance 267 78
Related Allowance 75 76
Total Acquired Loans | Residential real estate - Home equity    
Financing Receivable, Impaired [Line Items]    
Recorded Investment With No Related Allowance 1,514 1,372
Unpaid Principal Balance With No Related Allowance $ 1,453 $ 1,372