Loans and the Allowance for Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012		Jun. 30, 2013	Jun. 30, 2012
Investment and interest income recognized on impaired loans
Average Recorded Investment	$ 111,151	$ 147,379		$ 111,654	$ 149,621
Interest Income Recognized	231	839	[1]	757	1,690	[1]
Commercial, financial, agricultural [Member]
Investment and interest income recognized on impaired loans
Average Recorded Investment	5,601	3,667		5,551	3,730
Interest Income Recognized	0	7	[1]	0	15	[1]
Lease financing [Member]
Investment and interest income recognized on impaired loans
Average Recorded Investment	0	0		0	0
Interest Income Recognized	0	0	[1]	0	0	[1]
Real estate - construction [Member]
Investment and interest income recognized on impaired loans
Average Recorded Investment	1,650	6,093		1,650	6,141
Interest Income Recognized	0	0	[1]	0	0	[1]
Real estate - 1-4 family mortgage [Member]
Investment and interest income recognized on impaired loans
Average Recorded Investment	34,732	48,109		34,874	48,755
Interest Income Recognized	108	274	[1]	291	598	[1]
Real estate - commercial mortgage [Member]
Investment and interest income recognized on impaired loans
Average Recorded Investment	69,168	89,510		69,579	90,995
Interest Income Recognized	123	558	[1]	466	1,077	[1]
Installment loans to individuals [Member]
Investment and interest income recognized on impaired loans
Average Recorded Investment	0	0		0	0
Interest Income Recognized	$ 0	$ 0	[1]	$ 0	$ 0	[1]

[1] Includes interest income recognized using the cash-basis method of income recognition of $100. No interest income was recognized using the cash-basis method of income recognition during the three months ended June 30, 2013.