Earnings Per Common Share (Calculations of Basic and Diluted Earnings per Common Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Distributed earnings allocated to common stock	$ 1,490	$ 1,165	$ 2,764	$ 2,330
Undistributed earnings allocated to common stock	3,388	3,826	7,094	9,278
Net earnings allocated to common shareholders	$ 4,878	$ 4,991	$ 9,858	$ 11,608
Weighted-average number of common shares outstanding - basic	10,576,643	10,524,429	10,566,508	10,518,909
Effect of postentially dilutive common shares	20,390	0	17,875	20
Weighted-average number of common shares outstanding - diluted	10,597,033	10,524,429	10,584,383	10,518,929
Earnings per common share - basic	$ 0.46	$ 0.47	$ 0.93	$ 1.10
Earnings per common share - diluted	$ 0.46	$ 0.47	$ 0.93	$ 1.10
Anti-dilutive shares excluded from computation of EPS	86,986	141,776	103,438	157,995