Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Computation of Earnings Per Share
Net income available to common shareholders	$ 860	$ 203	$ 1,576	$ 590
Weighted average common shares outstanding	3,975,156	3,938,070	3,971,988	3,944,417
Basic earnings per common share	$ 0.22	$ 0.05	$ 0.40	$ 0.15
Effect of potential dilutive common shares	127,879	72,040	92,447	65,294
Total weighted average diluted common shares outstanding	4,103,035	4,285,370	4,064,435	4,291,717
Diluted earnings per common share	$ 0.21	$ 0.05	$ 0.39	$ 0.14