Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Other intangible assets, accumulated amortization	$ 1,560	$ 1,053
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	59,251,836	54,359,784
Common stock, shares outstanding	59,251,836	54,359,784
Preferred Stock, Series C Convertible [Member]
Preferred stock, par value	$ 50	$ 50
Preferred stock, shares authorized	14,400	14,400
Preferred stock, shares issued	10,434	14,400
Preferred stock, shares outstanding	10,434	14,400
Preferred Stock, Other Series [Member]
Preferred stock, par value	$ 50	$ 50
Preferred stock, shares authorized	981,260	981,260
Preferred stock, shares issued	0	0