Loans and Leases - Troubled Debt Restructured Loans (Details 10) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Loan	Dec. 31, 2011 Loan
Accruing Troubled Debt Restructured Loans [Member]
Troubled Debt Restructured Loans
Number of Loans	21	15
Pre-Restructuring Outstanding Recorded Investment	$ 7,815	$ 4,985
Post-Restructuring Outstanding Recorded Investment	7,815	4,982
Related Allowance
Accruing Troubled Debt Restructured Loans [Member] | Commercial, financial and agricultural [Member]
Troubled Debt Restructured Loans
Number of Loans	13	2
Pre-Restructuring Outstanding Recorded Investment	3,635	80
Post-Restructuring Outstanding Recorded Investment	3,635	80
Related Allowance
Accruing Troubled Debt Restructured Loans [Member] | Real estate-commercial real estate [Member]
Troubled Debt Restructured Loans
Number of Loans	5	5
Pre-Restructuring Outstanding Recorded Investment	2,630	2,438
Post-Restructuring Outstanding Recorded Investment	2,630	2,435
Related Allowance
Accruing Troubled Debt Restructured Loans [Member] | Real estate-construction [Member]
Troubled Debt Restructured Loans
Number of Loans	3	5
Pre-Restructuring Outstanding Recorded Investment	1,550	2,182
Post-Restructuring Outstanding Recorded Investment	1,550	2,182
Related Allowance
Accruing Troubled Debt Restructured Loans [Member] | Real estate-residential secured for business purpose [Member]
Troubled Debt Restructured Loans
Number of Loans		1
Pre-Restructuring Outstanding Recorded Investment		98
Post-Restructuring Outstanding Recorded Investment		98
Related Allowance
Accruing Troubled Debt Restructured Loans [Member] | Real estate-residential secured for personal purpose [Member]
Troubled Debt Restructured Loans
Number of Loans		1
Pre-Restructuring Outstanding Recorded Investment		156
Post-Restructuring Outstanding Recorded Investment		156
Related Allowance
Accruing Troubled Debt Restructured Loans [Member] | Real estate-home equity secured for personal purpose [Member]
Troubled Debt Restructured Loans
Number of Loans		1
Pre-Restructuring Outstanding Recorded Investment		31
Post-Restructuring Outstanding Recorded Investment		31
Related Allowance
Nonaccrual Troubled Debt Restructured Loans [Member]
Troubled Debt Restructured Loans
Number of Loans	4	4
Pre-Restructuring Outstanding Recorded Investment	1,057	11,429
Post-Restructuring Outstanding Recorded Investment	1,057	11,429
Related Allowance
Nonaccrual Troubled Debt Restructured Loans [Member] | Commercial, financial and agricultural [Member]
Troubled Debt Restructured Loans
Number of Loans	2
Pre-Restructuring Outstanding Recorded Investment	448
Post-Restructuring Outstanding Recorded Investment	448
Related Allowance
Nonaccrual Troubled Debt Restructured Loans [Member] | Real estate-commercial real estate [Member]
Troubled Debt Restructured Loans
Number of Loans	1	3
Pre-Restructuring Outstanding Recorded Investment	124	11,368
Post-Restructuring Outstanding Recorded Investment	124	11,368
Related Allowance
Nonaccrual Troubled Debt Restructured Loans [Member] | Real estate-residential secured for personal purpose [Member]
Troubled Debt Restructured Loans
Number of Loans	1	1
Pre-Restructuring Outstanding Recorded Investment	485	61
Post-Restructuring Outstanding Recorded Investment	485	61
Related Allowance