Loans and Leases - Non-Performing Loans and Leases (Details) $ in Thousands	Sep. 30, 2015 USD ($) loan borrowers	Dec. 31, 2014 USD ($)
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	$ 20,838	$ 17,337
Accruing Troubled Debt Restructured Loans And Lease Modifications	4,789	5,469
Recorded Investment 90 Days or more Past Due and Accruing Interest	428	451
Total Non-Performing Loans and Leases	26,055	23,257
Nonaccrual Troubled Debt Restructured Loans And Lease Modifications	742	3,100
Loans Held For Sale [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	4,000	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	4,000	0
Commercial, Financial and Agricultural [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	8,593	5,002
Accruing Troubled Debt Restructured Loans And Lease Modifications	1,959	2,851
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	10,552	7,853
Real Estate-Commercial [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	4,223	4,413
Accruing Troubled Debt Restructured Loans And Lease Modifications	2,474	2,618
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	6,697	7,031
Real Estate-Construction [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	363	5,931
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	$ 363	5,931
Nonaccrual Loans Held for Sale, Number of Loans | loan	2
Nonaccrual Loans Held for Sale, Number of Borrowers | borrowers	1
Nonaccrual Loans Held For Sale	$ 4,000
Real Estate-Residential Secured for Business Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	2,301	915
Accruing Troubled Debt Restructured Loans And Lease Modifications	343	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Total Non-Performing Loans and Leases	2,644	915
Real Estate-Residential Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	776	512
Accruing Troubled Debt Restructured Loans And Lease Modifications	0	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	41	0
Total Non-Performing Loans and Leases	817	512
Real Estate-Home Equity Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	160	184
Accruing Troubled Debt Restructured Loans And Lease Modifications	0	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	35	31
Total Non-Performing Loans and Leases	195	215
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	237	365
Total Non-Performing Loans and Leases	237	365
Lease Financings [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	422	380
Accruing Troubled Debt Restructured Loans And Lease Modifications	13	0
Recorded Investment 90 Days or more Past Due and Accruing Interest	115	55
Total Non-Performing Loans and Leases	$ 550	$ 435