Loans (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Contractual aging of the recorded investment in past due loans
Accruing 30-59 Days Past Due	$ 2,965	$ 2,168
Accruing 60-89 Days Past Due	834	1,382
Accruing Greater Than 90 Days	0	1
Nonaccrual	35,208	40,955
Current	1,184,803	1,181,575
Total Financing Receivables	1,223,810	1,226,081
Construction & Land Development [Member]
Contractual aging of the recorded investment in past due loans
Accruing 30-59 Days Past Due	346	7
Accruing 60-89 Days Past Due	0	0
Accruing Greater Than 90 Days	0	0
Nonaccrual	1,035	1,342
Current	58,245	59,387
Total Financing Receivables	59,626	60,736
Commercial real estate [Member]
Contractual aging of the recorded investment in past due loans
Accruing 30-59 Days Past Due	993	832
Accruing 60-89 Days Past Due	4	5
Accruing Greater Than 90 Days	0	0
Nonaccrual	12,689	17,234
Current	467,782	468,757
Total Financing Receivables	481,468	486,828
Residential real estate [Member]
Contractual aging of the recorded investment in past due loans
Accruing 30-59 Days Past Due	1,468	1,179
Accruing 60-89 Days Past Due	830	1,377
Accruing Greater Than 90 Days	0	1
Nonaccrual	21,180	22,099
Current	551,045	544,675
Total Financing Receivables	574,523	569,331
Commercial and financial [Member]
Contractual aging of the recorded investment in past due loans
Accruing 30-59 Days Past Due	48	41
Accruing 60-89 Days Past Due	0	0
Accruing Greater Than 90 Days	0	0
Nonaccrual	0	0
Current	64,704	61,862
Total Financing Receivables	64,752	61,903
Consumer [Member]
Contractual aging of the recorded investment in past due loans
Accruing 30-59 Days Past Due	110	109
Accruing 60-89 Days Past Due	0	0
Accruing Greater Than 90 Days	0	0
Nonaccrual	304	280
Current	42,834	46,541
Total Financing Receivables	43,248	46,930
Other [Member]
Contractual aging of the recorded investment in past due loans
Accruing 30-59 Days Past Due	0	0
Accruing 60-89 Days Past Due	0	0
Accruing Greater Than 90 Days	0	0
Nonaccrual	0	0
Current	193	353
Total Financing Receivables	$ 193	$ 353