Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share
Stock options excluded (in shares)	13,744	233,630	53,310	358,151
Net Income
Net income	$ 3,066	$ 3,462	$ 4,789	$ 11,965
Basic income available to common stockholders	3,066	3,462	4,789	11,965
Diluted income available to common stockholders plus assumed conversions	$ 3,066	$ 3,462	$ 4,789	$ 11,965
Shares
Basic income available to common stockholders (in shares)	16,640,471	10,330,814	15,512,508	10,332,223
Effect of warrants and dilutive stock options (in shares)	841,759	502,120	802,193	377,599
Diluted income available to common stockholders plus assumed conversions (in shares)	17,482,230	10,832,934	16,314,701	10,709,822
Per Share Amount
Basic income available to common stockholders (in dollars per share)	$ 0.19	$ 0.34	$ 0.31	$ 1.16
Diluted income available to common stockholders plus assumed conversions (in dollars per share)	$ 0.18	$ 0.32	$ 0.29	$ 1.12