Fair Value Measurements (Details 4) (Nonrecurring, USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 10,026		$ 19,406		$ 10,026		$ 19,406
Other real estate owned and repossessed assets	12,438		15,868		12,438		15,868
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	10,026		19,406		10,026		19,406
Other real estate owned and repossessed assets	12,438		15,868		12,438		15,868
Total Gains (Losses)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) on impaired loans	(204)	[1]	(1,064)	[1]	(2,154)	[1]	(2,501)	[1]
Gains (losses) on other real estate owned and repossessed assets	(203)	[1]	(320)	[1]	(1,733)	[1]	(5,006)	[1]
Commercial, financial, and agricultural | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,364		1,315		1,364		1,315
Commercial, financial, and agricultural | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,364		1,315		1,364		1,315
Commercial, financial, and agricultural | Total Gains (Losses)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) on impaired loans	(28)	[1]	(607)	[1]	(150)	[1]	(692)	[1]
Real estate construction - residential | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,767		1,902		1,767		1,902
Real estate construction - residential | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,767		1,902		1,767		1,902
Real estate construction - residential | Total Gains (Losses)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) on impaired loans	0	[1]	0	[1]	(60)	[1]	(119)	[1]
Real estate construction - commercial | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) on impaired loans	0	[1]	0	[1]	(491)	[1]	0	[1]
Real estate construction - commercial | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			3,990				3,990
Real estate construction - commercial | Total Gains (Losses)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			3,990				3,990
Real estate mortgage - residential | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,795		2,079		3,795		2,079
Real estate mortgage - residential | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,795		2,079		3,795		2,079
Real estate mortgage - residential | Total Gains (Losses)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) on impaired loans	(41)	[1]	(81)	[1]	(179)	[1]	(327)	[1]
Real estate mortgage - commercial | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	2,887		10,082		2,887		10,082
Real estate mortgage - commercial | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	2,887		10,082		2,887		10,082
Real estate mortgage - commercial | Total Gains (Losses)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) on impaired loans	(131)	[1]	(376)	[1]	(1,200)	[1]	(1,363)	[1]
Consumer | Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	213				213
Gains (losses) on impaired loans			0	[1]			0	[1]
Consumer | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	213		38		213		38
Consumer | Total Gains (Losses)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans			38				38
Gains (losses) on impaired loans	$ (4)	[1]			$ (74)	[1]

[1] Total gains (losses) reported for other real estate and foreclosed assets includes charge-offs, valuation write downs, and net losses taken during the periods reported.