Earnings Per Common 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
Basic earnings per common share
Net income	$ 1,565	$ 2,513	$ 3,775	$ 3,862
Less: earnings allocated to participating securities	58	95	138	147
Basic earnings allocated to common shareholders	1,507	2,418	3,637	3,715
Weighted-average common shares outstanding, excluding participating securities	2,530,651	2,499,136	2,530,368	2,498,530
Basic earnings per common share	$ 0.60	$ 0.97	$ 1.44	$ 1.49
Diluted earnings per common share
Earnings allocated to common shareholders	1,507	2,418	3,637	3,715
Reallocation of undistributed earnings	0	0	0	0
Diluted earnings allocated to common shareholders	$ 1,507	$ 2,418	$ 3,637	$ 3,715
Weighted average common shares outstanding	2,530,651	2,499,136	2,530,368	2,498,530
Dilutive effect of share-based awards	1,940	0	1,479	0
Weighted-average diluted common shares outstanding	2,532,591	2,499,136	2,531,847	2,498,530
Diluted earnings per common share	$ 0.60	$ 0.97	$ 1.44	$ 1.49