Net Income Per Common Share (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Income Per Common Share
Weighted average common basic shares outstanding	21,911,574	15,668,129	21,890,861	15,632,817
Effect of dilutive stock options and restricted stock units (in shares)	374,149	260,556	335,169	250,718
Weighted average common diluted shares outstanding	22,285,723	15,928,685	22,226,030	15,883,535
Net income per share:
Basic (in dollars per share)	$ 0.17	$ 0.14	$ 0.32	$ 0.51
Diluted (in dollars per share)	$ 0.17	$ 0.14	$ 0.31	$ 0.50
Additional securities not included in the computation of diluted net income per share	0	0	0	0