Allowance for Loan Losses (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Performing and nonperforming loans
Performing	$ 157,610	$ 171,642
Nonperforming		293
Total	157,610	171,935
Residential Real Estate [Member]
Performing and nonperforming loans
Performing	145,378	159,291
Nonperforming		292
Total	145,378	159,583
Real estate - construction [Member]
Performing and nonperforming loans
Performing	3,155	2,324
Nonperforming
Total	3,155	2,324
Consumer [Member]
Performing and nonperforming loans
Performing	9,077	10,027
Nonperforming		1
Total	$ 9,077	$ 10,028