Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share
Stock options excluded	102,193	271,511
Net Income
Net income	$ 1,972	$ 2,692
Basic income available to common stockholders	1,972	2,692
Diluted income available to common stockholders plus assumed conversions	$ 1,972	$ 2,692
Shares
Basic income available to common stockholders (in shares)	14,355,407	10,335,935
Effect of warrants and dilutive stock options (in shares)	761,809	290,239
Diluted income available to common stockholders plus assumed conversions (in shares)	15,117,216	10,626,174
Per Share Amount
Basic income available to common stockholders (in dollars per share)	$ 0.14	$ 0.26
Diluted income available to common stockholders plus assumed conversions (in dollars per share)	$ 0.13	$ 0.25