Loans and Leases - Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	$ 30,525	$ 38,207
Accruing Troubled Debt Restructured Loans and Lease Modifications	13,383	3,893
Total Impaired Loans and Leases	43,908	42,100
Loans held for sale [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	2,599
Accruing Troubled Debt Restructured Loans and Lease Modifications
Total Impaired Loans and Leases	2,599
Commercial, financial and agricultural [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	3,966	4,614
Accruing Troubled Debt Restructured Loans and Lease Modifications	266	77
Total Impaired Loans and Leases	4,232	4,691
Real estate-commercial [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	9,318	18,085
Accruing Troubled Debt Restructured Loans and Lease Modifications	10,588	2,435
Total Impaired Loans and Leases	19,906	20,520
Real estate-construction [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	13,614	14,479
Accruing Troubled Debt Restructured Loans and Lease Modifications	2,456	1,262
Total Impaired Loans and Leases	16,070	15,741
Real estate-residential secured for business purpose [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	175	107
Accruing Troubled Debt Restructured Loans and Lease Modifications		8
Total Impaired Loans and Leases	175	115
Real estate-residential secured for personal purpose [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	323	57
Accruing Troubled Debt Restructured Loans and Lease Modifications
Total Impaired Loans and Leases	323	57
Real estate-home equity secured for personal purpose [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases		27
Accruing Troubled Debt Restructured Loans and Lease Modifications
Total Impaired Loans and Leases		27
Loans to individuals [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases
Accruing Troubled Debt Restructured Loans and Lease Modifications	48	50
Total Impaired Loans and Leases	48	50
Lease financings [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	530	838
Accruing Troubled Debt Restructured Loans and Lease Modifications	25	61
Total Impaired Loans and Leases	$ 555	$ 899