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Allowance for Loan and Lease Losses (Details 6) - Originated Loans and Leases
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
loan
Dec. 31, 2015
USD ($)
loan
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan 15 24
Pre-Modification Outstanding Recorded Investment $ 2,439 $ 4,812
Post- Modification Outstanding Recorded Investment $ 2,439 $ 4,812
Number of Loans TDRs | loan 1 [1] 4 [2]
Post-modification Outstanding Recorded Investment TDRs $ 1,800 [1] $ 447 [2]
Commercial and industrial other    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan 2 [3] 5 [4]
Pre-Modification Outstanding Recorded Investment $ 1,115 [3] $ 433 [4]
Post- Modification Outstanding Recorded Investment $ 1,115 [3] $ 433 [4]
Number of Loans TDRs | loan 0 [1],[3] 2 [2],[4]
Post-modification Outstanding Recorded Investment TDRs $ 0 [1],[3] $ 311 [2],[4]
Concession, extension of term, loan  
Concession, extended term and lowered rate, loan  
Commercial real estate other    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan [5] 1 3
Pre-Modification Outstanding Recorded Investment [5] $ 50 $ 2,552
Post- Modification Outstanding Recorded Investment [5] $ 50 $ 2,552
Number of Loans TDRs | loan [1],[5] 1 0
Post-modification Outstanding Recorded Investment TDRs [1],[5] $ 1,800 $ 0
Concession, extension of term, loan  
Concession, extended term and lowered rate, loan  
Residential real estate Home Equity    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan [6] 12 14
Pre-Modification Outstanding Recorded Investment [6] $ 1,274 $ 1,558
Post- Modification Outstanding Recorded Investment [6] $ 1,274 $ 1,558
Number of Loans TDRs | loan [1],[6] 0 2
Post-modification Outstanding Recorded Investment TDRs [1],[6] $ 0 $ 136
Concession, extension of term, loan  
Concession, extended term and lowered rate, loan  
Residential real estate Mortgages    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan [7]   2
Pre-Modification Outstanding Recorded Investment [7]   $ 269
Post- Modification Outstanding Recorded Investment [7]   $ 269
Number of Loans TDRs | loan [2],[7]   0
Post-modification Outstanding Recorded Investment TDRs [2],[7]   $ 0
Concession, extension of term, loan 269  
Concession, extended term and lowered rate, loan $ 269  
Extended Term | Commercial and Industrial Sector [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan   2
Post- Modification Outstanding Recorded Investment   $ 319
Extended Term | Commercial real estate other    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan   1
Post- Modification Outstanding Recorded Investment   $ 28
Extended Term | Residential real estate Home Equity    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan   9
Post- Modification Outstanding Recorded Investment   $ 630
Reduction of Interest Rate | Commercial and Industrial Sector [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan   3
Post- Modification Outstanding Recorded Investment   $ 114
Reduction of Interest Rate | Commercial real estate other    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan   2
Post- Modification Outstanding Recorded Investment   $ 2,500
Reduction of Interest Rate | Residential real estate Home Equity    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan   5
Post- Modification Outstanding Recorded Investment   $ 928
Extension of Term/Reduction of Rate | Residential real estate Mortgages    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan   2
Post- Modification Outstanding Recorded Investment   $ 269
[1] TDRs that defaulted during the 12 months ended December 31, 2015 that had been restructured in the prior twelve months.
[2] Represents the following concessions: extension of term (9 loans $630,000) and reduction of rate (5 loans $928,000).
[3] Represents the following concessions: extension of term and reduction of rate.
[4] Represents the following concessions: extension of term (2 loans $319,000) and reduction of rate (3 loans $114,000).
[5] Represents the following concessions: reduction of rate.
[6] Represents the following concessions: extension of term and reduction of rate.
[7] TDRs that defaulted during the 12 months ended December 31, 2016 that had been restructured in the prior twelve months.