Loans and Leases - Non-Performing Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	$ 19,856	$ 17,916
Accruing Troubled Debt Restructured Loans And Lease Modifications	2,818	3,252
Recorded Investment 90 Days or more Past Due and Accruing Interest	919	987
Total Non-Performing Loans and Leases	23,593	22,155
Nonaccrual Troubled Debt Restructured Loans And Lease Modifications	1,700	1,800
Commercial, Financial and Agricultural [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	5,305	5,746
Accruing Troubled Debt Restructured Loans And Lease Modifications	954	967
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	6,259	6,713
Real Estate-Commercial [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	4,133	5,651
Accruing Troubled Debt Restructured Loans And Lease Modifications	1,506	1,519
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	5,639	7,170
Real Estate-Residential Secured for Business Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	3,845	4,898
Accruing Troubled Debt Restructured Loans And Lease Modifications	316	766
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	4,161	5,664
Real Estate-Residential Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	514	560
Accruing Troubled Debt Restructured Loans And Lease Modifications	42	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	508	481
Total Non-Performing Loans and Leases	1,064	1,041
Real Estate-Home Equity Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	498	525
Accruing Troubled Debt Restructured Loans And Lease Modifications	0	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	109	171
Total Non-Performing Loans and Leases	607	696
Loans to Individuals [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	0	0
Accruing Troubled Debt Restructured Loans And Lease Modifications	0	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	142	142
Total Non-Performing Loans and Leases	142	142
Lease Financings [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	5,561	536
Accruing Troubled Debt Restructured Loans And Lease Modifications	0	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	160	193
Total Non-Performing Loans and Leases	$ 5,721	$ 729