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		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share [Abstract]
Distributed earnings allocated to common stock	$ 1,166	$ 1,056	$ 3,496	$ 2,110
Undistributed earnings allocated to common stock	3,620	2,614	12,900	5,584
Net earnings allocated to common shareholders	$ 4,786	$ 3,670	$ 16,396	$ 7,694
Weighted-average number of common shares outstanding - basic	10,530,800	10,484,609	10,522,874	10,478,310
Effect of postentially dilutive common shares	76	35,064	31	20,398
Weighted-average number of common shares outstanding - diluted	10,530,876	10,519,673	10,522,905	10,498,708
Earnings per common share - basic	$ 0.45	$ 0.35	$ 1.56	$ 0.74
Earnings per common share - diluted	$ 0.45	$ 0.35	$ 1.56	$ 0.73
Restricted Shares, Stock Options and SARs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from computation of EPS			147,756	248,093