Loans (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Total loans, gross	$ 642,014		$ 597,775
Unearned discount	(80)		(103)
Net deferred loan fees and costs	396		260
Allowance for loan and lease losses	(18,588)	(18,473)	(18,536)	(19,600)	(20,664)	(20,834)
Loans, net	623,742		579,396
Residential real estate
Total loans, gross	109,805		90,228
Commercial Real Estate
Total loans, gross	240,130		221,591
Construction, land acquisition and development
Total loans, gross	25,374		32,502
Commercial and industrial
Total loans, gross	111,437		109,693
Consumer
Total loans, gross	113,187		109,783
State and Political Subdivisions
Total loans, gross	42,081		33,978
Allowance for loan and lease losses	$ (983)	$ (687)	$ (673)	$ (456)	$ (417)	$ (452)