Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Stock options excluded (in shares)	780,659	814,369	503,676	800,806	593,387
Net Income
Net income	$ 7,825	$ 1,789	$ 4,643	$ 9,613	$ 7,275
Basic income available to common stockholders	7,825	1,789	4,643	9,613	7,275
Diluted income available to common stockholders plus assumed conversions	$ 7,825	$ 1,789	$ 4,643	$ 9,613	$ 7,275
Shares
Basic income available to common stockholders (in shares)	21,493,641	20,091,924	17,124,337	20,796,655	17,083,194
Effect of dilutive stock options and warrants (in shares)	335,235	290,908	352,053	329,887	339,734
Diluted income available to common stockholders plus assumed conversions (in shares)	21,828,876	20,382,832	17,476,390	21,126,542	17,422,928
Per Share Amount
Basic income available to common stockholders (in dollars per share)	$ 0.36	$ 0.09	$ 0.28	$ 0.46	$ 0.43
Diluted income available to common stockholders plus assumed conversions (in dollars per share)	$ 0.36	$ 0.09	$ 0.27	$ 0.46	$ 0.42