Non-performing Assets and Impaired Loans (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012 Defaults	Dec. 31, 2011 Defaults
Loans transferred and classified as troubled debt restructuring
Number of Defaults	10	5
Unpaid Principal Balance	$ 4,045	$ 2,173
Commercial [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults	6	3
Unpaid Principal Balance	2,877	1,053
Commercial [Member] | Owner occupied real estate [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults	3	1
Unpaid Principal Balance	1,272	835
Commercial [Member] | Non owner occupied real estate [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults	3
Unpaid Principal Balance	1,605
Commercial [Member] | Residential development [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults
Unpaid Principal Balance
Commercial [Member] | Development & Spec Land Loans [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults
Unpaid Principal Balance
Commercial [Member] | Commercial and industrial [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults		2
Unpaid Principal Balance		218
Real estate [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults	4	2
Unpaid Principal Balance	1,168	1,120
Real estate [Member] | Residential mortgage [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults	4	2
Unpaid Principal Balance	1,168	1,120
Real estate [Member] | Residential construction [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults
Unpaid Principal Balance
Real estate [Member] | Mortgage warehouse [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults
Unpaid Principal Balance
Consumer [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults
Unpaid Principal Balance
Consumer [Member] | Direct Installment [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults
Unpaid Principal Balance
Consumer [Member] | Direct Installment Purchased [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults
Unpaid Principal Balance
Consumer [Member] | Indirect Installment [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults
Unpaid Principal Balance
Consumer [Member] | Home Equity [Member]
Loans transferred and classified as troubled debt restructuring
Number of Defaults
Unpaid Principal Balance