Allowance for Loan and Lease Losses (Details 7) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Originated Loans and Leases [Member]    
Loans and Leases, gross $ 1,183,592 $ 1,085,152
Originated Loans and Leases [Member] | Residential Real Estate - Home equity [Member]    
Loans and Leases, gross 208,329 202,578
Originated Loans and Leases [Member] | Residential Real Estate - Mortgages [Member]    
Loans and Leases, gross 917,755 823,841
Originated Loans and Leases [Member] | Consumer Indirect [Member]    
Loans and Leases, gross 15,893 17,829
Originated Loans and Leases [Member] | Consumer Other [Member]    
Loans and Leases, gross 41,615 40,904
Originated Loans and Leases [Member] | Performing [Member]    
Loans and Leases, gross 1,176,632 1,077,150
Originated Loans and Leases [Member] | Performing [Member] | Residential Real Estate - Home equity [Member]    
Loans and Leases, gross 206,784 200,647
Originated Loans and Leases [Member] | Performing [Member] | Residential Real Estate - Mortgages [Member]    
Loans and Leases, gross 912,563 817,952
Originated Loans and Leases [Member] | Performing [Member] | Consumer Indirect [Member]    
Loans and Leases, gross 15,680 17,722
Originated Loans and Leases [Member] | Performing [Member] | Consumer Other [Member]    
Loans and Leases, gross 41,605 40,829
Originated Loans and Leases [Member] | Nonperforming [Member]    
Loans and Leases, gross 6,960 8,002
Originated Loans and Leases [Member] | Nonperforming [Member] | Residential Real Estate - Home equity [Member]    
Loans and Leases, gross 1,545 1,931
Originated Loans and Leases [Member] | Nonperforming [Member] | Residential Real Estate - Mortgages [Member]    
Loans and Leases, gross 5,192 5,889
Originated Loans and Leases [Member] | Nonperforming [Member] | Consumer Indirect [Member]    
Loans and Leases, gross 213 107
Originated Loans and Leases [Member] | Nonperforming [Member] | Consumer Other [Member]    
Loans and Leases, gross 10 75
Acquired Loans and Leases [Member]    
Loans and Leases, gross 70,553 70,494
Acquired Loans and Leases [Member] | Residential Real Estate - Home equity [Member]    
Loans and Leases, gross 39,630 42,092
Acquired Loans and Leases [Member] | Residential Real Estate - Mortgages [Member]    
Loans and Leases, gross 30,056 27,491
Acquired Loans and Leases [Member] | Consumer Indirect [Member]    
Loans and Leases, gross 0 0
Acquired Loans and Leases [Member] | Consumer Other [Member]    
Loans and Leases, gross 867 911
Acquired Loans and Leases [Member] | Performing [Member]    
Loans and Leases, gross 68,442 68,393
Acquired Loans and Leases [Member] | Performing [Member] | Residential Real Estate - Home equity [Member]    
Loans and Leases, gross 38,706 41,380
Acquired Loans and Leases [Member] | Performing [Member] | Residential Real Estate - Mortgages [Member]    
Loans and Leases, gross 28,869 26,102
Acquired Loans and Leases [Member] | Performing [Member] | Consumer Indirect [Member]    
Loans and Leases, gross 0 0
Acquired Loans and Leases [Member] | Performing [Member] | Consumer Other [Member]    
Loans and Leases, gross 867 911
Acquired Loans and Leases [Member] | Nonperforming [Member]    
Loans and Leases, gross 2,111 2,101
Acquired Loans and Leases [Member] | Nonperforming [Member] | Residential Real Estate - Home equity [Member]    
Loans and Leases, gross 924 712
Acquired Loans and Leases [Member] | Nonperforming [Member] | Residential Real Estate - Mortgages [Member]    
Loans and Leases, gross 1,187 1,389
Acquired Loans and Leases [Member] | Nonperforming [Member] | Consumer Indirect [Member]    
Loans and Leases, gross 0 0
Acquired Loans and Leases [Member] | Nonperforming [Member] | Consumer Other [Member]    
Loans and Leases, gross $ 0 $ 0