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Earnings Per 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 basic and diluted weighted average common share outstanding
Net income	$ 3,396	$ 3,284	$ 11,734	$ 11,193
Basic weighted-average common shares outstanding	9,382,994	9,346,397	9,375,457	9,326,070
Effect of potentially dilutive common shares	115,741	26,997	82,231	33,188
Diluted weighted-average common shares outstanding	9,498,735	9,373,394	9,457,688	9,359,258
Earnings per basic common share	$ 0.36	$ 0.35	$ 1.25	$ 1.20
Earnings per diluted common share	$ 0.36	$ 0.35	$ 1.24	$ 1.20
Antidilutive shares not included in diluted common share calculation	96,480	10,000	120,480	16,261

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