Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share
Securities excluded from diluted earnings per share calculation	660,109	13,744	615,587	53,310
Net Income
Net income	$ 5,450	$ 3,066	$ 12,725	$ 4,789
Basic income available to common stockholders	5,450	3,066	12,725	4,789
Diluted income available to common stockholders plus assumed conversions	$ 5,450	$ 3,066	$ 12,725	$ 4,789
Shares
Basic income available to common stockholders (in shares)	17,069,216	16,640,471	17,078,945	15,512,508
Effect of dilutive stock options (in shares)	273,666	841,759	306,890	802,193
Diluted income available to common stockholders plus assumed conversions (in shares)	17,342,882	17,482,230	17,385,835	16,314,701
Per Share Amount
Basic income available to common stockholders (in dollars per share)	$ 0.32	$ 0.19	$ 0.75	$ 0.31
Diluted income available to common stockholders plus assumed conversions (in dollars per share)	$ 0.31	$ 0.18	$ 0.73	$ 0.29