Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Components of earnings per share
Net income (loss) allocated to common shareholders	$ 6,504	$ 145	$ 9,616	$ (1,531)
Weighted-average number of common shares - basic	11,347,683	9,786,906	11,347,683	9,492,704
Stock-based compensation plans	188,673	121,575	183,859	0
Warrants	102,712	67,510	100,809	0
Weighted-average number of common shares - diluted	11,639,068	9,975,991	11,632,351	9,492,704
Basic earnings (loss) per share	$ 0.57	$ 0.01	$ 0.85	$ (0.16)
Diluted earnings (loss) per share	$ 0.56	$ 0.01	$ 0.83	$ (0.16)