Allowance for Loan Losses (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Performing and nonperforming loans
Performing	$ 160,629	$ 171,642
Nonperforming	652	293
Total	161,281	171,935
Residential Real Estate [Member]
Performing and nonperforming loans
Performing	148,623	159,291
Nonperforming	632	292
Total	149,255	159,583
Real Estate Construction [Member]
Performing and nonperforming loans
Performing	2,564	2,324
Total	2,564	2,324
Consumer [Member]
Performing and nonperforming loans
Performing	9,442	10,027
Nonperforming	20	1
Total	$ 9,462	$ 10,028