Summary of Significant Accounting Policies (Schedule of Earnings Per Share Basic and Diluted) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 4,984	$ 5,094	$ 4,923	$ 4,924	$ 4,469	$ 4,454	$ 4,353	$ 4,231	$ 19,925	$ 17,507	$ 13,926
Preferred stock dividends and accretion									141	281	820
Net income available to common stockholders	$ 4,955	$ 5,066	$ 4,895	$ 4,868	$ 4,441	$ 4,426	$ 4,269	$ 4,090	$ 19,784	$ 17,226	$ 13,106
Average number of common shares outstanding	16,350,183	16,349,480	16,348,915	16,348,215	16,347,564	16,347,088	16,333,653	16,332,327	16,349,204	16,340,197	16,295,761
Plus: effect of dilutive options and warrants									37,000	11,000	19,000
Anti dilutive common shares outstanding									14,000	42,000	79,000
Average number of common shares outstanding used to calculate diluted earnings per common share	16,396,931	16,385,155	16,375,774	16,373,588	16,363,698	16,362,635	16,341,767	16,338,162	16,385,692	16,351,046	16,314,899
Diluted	$ 0.30	$ 0.31	$ 0.30	$ 0.30	$ 0.27	$ 0.27	$ 0.26	$ 0.25	$ 1.21	$ 1.05	$ 0.80
Basic	$ 0.30	$ 0.31	$ 0.30	$ 0.30	$ 0.27	$ 0.27	$ 0.26	$ 0.25	$ 1.21	$ 1.05	$ 0.80
Weighted Average [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Average number of common shares outstanding									16,349,000	16,340,000	16,296,000
Average number of common shares outstanding used to calculate diluted earnings per common share									16,386,000	16,351,000	16,315,000