Loans and Allowance for Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Aging information for the Company's past due and non-accrual loans
Current or Less Than 30 Days Past Due	$ 833,605	$ 808,937
30 - 89 Days Past Due	2,895	6,687
90 Days Past Due And Still Accruing	105	243
Non-Accrual	24,380	23,680
Total	860,985	839,547
Commercial, Financial, and Agricultural
Aging information for the Company's past due and non-accrual loans
Current or Less Than 30 Days Past Due	148,276	139,219
30 - 89 Days Past Due	421	942
90 Days Past Due And Still Accruing	0	0
Non-Accrual	2,036	1,684
Total	150,733	141,845
Real Estate Construction - Residential
Aging information for the Company's past due and non-accrual loans
Current or Less Than 30 Days Past Due	17,895	18,738
30 - 89 Days Past Due	0	66
90 Days Past Due And Still Accruing	0	0
Non-Accrual	2,040	2,204
Total	19,935	21,008
Real Estate Construction - Commercial
Aging information for the Company's past due and non-accrual loans
Current or Less Than 30 Days Past Due	56,657	48,230
30 - 89 Days Past Due	0	595
90 Days Past Due And Still Accruing	56	0
Non-Accrual	5,678	6,251
Total	62,391	55,076
Real Estate Mortgage - Residential
Aging information for the Company's past due and non-accrual loans
Current or Less Than 30 Days Past Due	228,157	217,268
30 - 89 Days Past Due	864	4,068
90 Days Past Due And Still Accruing	48	129
Non-Accrual	5,175	4,165
Total	234,244	225,630
Real Estate Mortgage - Commercial
Aging information for the Company's past due and non-accrual loans
Current or Less Than 30 Days Past Due	364,414	365,787
30 - 89 Days Past Due	1,312	725
90 Days Past Due And Still Accruing	0	100
Non-Accrual	9,183	9,074
Total	374,909	375,686
Installment and other consumer
Aging information for the Company's past due and non-accrual loans
Current or Less Than 30 Days Past Due	18,206	19,695
30 - 89 Days Past Due	298	291
90 Days Past Due And Still Accruing	1	14
Non-Accrual	268	302
Total	$ 18,773	$ 20,302