Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
EQUITY:
Common stock, par value ($ per share)	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	74,451,790	63,085,432
Common stock, shares outstanding	74,451,790	63,085,432
Series A and Series B Preferred Stock [Member]
EQUITY:
Preferred stock, par value ($ per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Series A Junior Participating Preferred Stock [Member]
EQUITY:
Preferred stock, shares authorized	25,000	25,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
9.25% Series B Cumulative Preferred Stock
EQUITY:
Preferred Stock, dividend rate (percentage)	9.25%	9.25%
Preferred stock, shares authorized	6,000,000	6,000,000
Preferred stock, shares issued	3,176,734	3,176,734
Preferred stock, shares outstanding	3,176,734	3,176,734
Preferred stock Series B, aggregate liquidation preference	$ 79,418	$ 79,418