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, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 4,469	$ 4,454	$ 4,353	$ 4,231	$ 3,622	$ 3,702	$ 3,584	$ 3,018	$ 17,507	$ 13,926	$ 7,004
Preferred Stock Dividends									281	820	581
Net Income (Loss) Available to Common Stockholders, Basic	$ 4,441	$ 4,426	$ 4,269	$ 4,090	$ 3,238	$ 3,557	$ 3,439	$ 2,872	$ 17,226	$ 13,106	$ 6,423
Weighted Average Number of Shares Outstanding, Basic	16,347,564	16,347,088	16,333,653	16,332,327	16,311,193	16,290,700	16,290,700	16,290,391	16,340,197	16,295,761	15,025,870
Plus: effect of dilutive options and warrants									11,000	19,000	1,000
Weighted Average Number of Shares Outstanding, Diluted	16,363,698	16,362,635	16,341,767	16,338,162	16,327,990	16,313,366	16,315,667	16,300,604	16,351,046	16,314,899	15,027,159
Earnings Per Share, Basic	$ 0.27	$ 0.27	$ 0.26	$ 0.25	$ 0.20	$ 0.22	$ 0.21	$ 0.18	$ 1.05	$ 0.80	$ 0.43
Earnings Per Share, Diluted	$ 0.27	$ 0.27	$ 0.26	$ 0.25	$ 0.20	$ 0.22	$ 0.21	$ 0.18	$ 1.05	$ 0.80	$ 0.43
Weighted Average [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted Average Number of Shares Outstanding, Basic									16,340,000	16,296,000	15,026,000
Weighted Average Number of Shares Outstanding, Diluted									16,351,000	16,315,000	15,027,000