Loans (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Information relating to loans
Loans	$ 1,202,478	$ 1,208,074
Construction and Land Development [Member]
Information relating to loans
Loans	56,213	49,184
Commercial Real Estate [Member]
Information relating to loans
Loans	473,803	508,353
Residential Real Estate [Member]
Information relating to loans
Loans	562,421	546,246
Commercial and Financial [Member]
Information relating to loans
Loans	58,222	53,105
Consumer [Member]
Information relating to loans
Loans	51,564	50,611
Other loans [Member]
Information relating to loans
Loans	$ 255	$ 575