Loans and Leases - Troubled Debt Restructured Loans (Details 8) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012 Loans	Jun. 30, 2011 Loans	Jun. 30, 2012 Loans	Jun. 30, 2011
Accruing Troubled Debt Restructured Loans [Member]
Troubled Debt Restructured Loans
Number of Loans	2	3	13	13
Pre-Restructuring Outstanding Recorded Investment	$ 310	$ 285	$ 3,964	$ 4,905
Post-Restructuring Outstanding Recorded Investment	310	285	3,964	4,902
Related Allowance
Accruing Troubled Debt Restructured Loans [Member] | Commercial, financial and agricultural [Member]
Troubled Debt Restructured Loans
Number of Loans	1		8
Pre-Restructuring Outstanding Recorded Investment	135		1,672
Post-Restructuring Outstanding Recorded Investment	135		1,672
Related Allowance
Accruing Troubled Debt Restructured Loans [Member] | Real estate-commercial [Member]
Troubled Debt Restructured Loans
Number of Loans	1		3	5
Pre-Restructuring Outstanding Recorded Investment	175		962	2,438
Post-Restructuring Outstanding Recorded Investment	175		962	2,435
Related Allowance
Accruing Troubled Debt Restructured Loans [Member] | Real estate-construction [Member]
Troubled Debt Restructured Loans
Number of Loans			2	5
Pre-Restructuring Outstanding Recorded Investment			1,330	2,182
Post-Restructuring Outstanding Recorded Investment			1,330	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		1
Pre-Restructuring Outstanding Recorded Investment		98		98
Post-Restructuring Outstanding Recorded Investment		98		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		1
Pre-Restructuring Outstanding Recorded Investment		156		156
Post-Restructuring Outstanding Recorded Investment		156		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		1
Pre-Restructuring Outstanding Recorded Investment		31		31
Post-Restructuring Outstanding Recorded Investment		31		31
Related Allowance
Non Accrual Troubled Debt Restructured Loans [Member]
Troubled Debt Restructured Loans
Number of Loans			3	1
Pre-Restructuring Outstanding Recorded Investment			572	2,765
Post-Restructuring Outstanding Recorded Investment			572	2,765
Related Allowance
Non Accrual 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
Non Accrual Troubled Debt Restructured Loans [Member] | Real estate-commercial [Member]
Troubled Debt Restructured Loans
Number of Loans			1	1
Pre-Restructuring Outstanding Recorded Investment			124	2,765
Post-Restructuring Outstanding Recorded Investment			124	2,765
Related Allowance