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Net Income Per Share (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net Income Per Share
Basic weighted average common shares outstanding during the year	6,679,412	6,475,540	6,157,310
Weighted average common equivalent shares due to stock options and restricted stock units	349,057	523,760	591,752
Diluted weighted average common shares outstanding during the year	7,028,469	6,999,300	6,749,062
Number of stock awards excluded from the computation of diluted income per share	17,770	23,205	101,769

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