Loans and Leases - Non-Performing Loans and Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	$ 20,174	$ 17,916
Accruing Troubled Debt Restructured Loans And Lease Modifications	11,470	3,252
Recorded Investment 90 Days or more Past Due and Accruing Interest	572	987
Total Non-Performing Loans and Leases	32,216	22,155
Nonaccrual Troubled Debt Restructured Loans And Lease Modifications	1,800	1,800
Commercial, Financial and Agricultural [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	5,002	5,746
Accruing Troubled Debt Restructured Loans And Lease Modifications	942	967
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	5,944	6,713
Real Estate-Commercial [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	4,681	5,651
Accruing Troubled Debt Restructured Loans And Lease Modifications	10,257	1,519
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	14,938	7,170
Real Estate-Construction [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	365	0
Accruing Troubled Debt Restructured Loans And Lease Modifications	0	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	365	0
Real Estate-Residential Secured for Business Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	3,540	4,898
Accruing Troubled Debt Restructured Loans And Lease Modifications	229	766
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	3,769	5,664
Real Estate-Residential Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	662	560
Accruing Troubled Debt Restructured Loans And Lease Modifications	42	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	271	481
Total Non-Performing Loans and Leases	975	1,041
Real Estate-Home Equity Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	263	525
Accruing Troubled Debt Restructured Loans And Lease Modifications	0	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	35	171
Total Non-Performing Loans and Leases	298	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	130	142
Total Non-Performing Loans and Leases	130	142
Lease Financings [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	5,661	536
Accruing Troubled Debt Restructured Loans And Lease Modifications	0	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	136	193
Total Non-Performing Loans and Leases	$ 5,797	$ 729