CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Shareholders' equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	29,851,509	29,851,509
Common stock, shares outstanding	22,942,437	22,942,437
SeriesAPreferredStockMember
Shareholders' equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	9,000,000	9,000,000
Preferred stock, shares issued	7,530,681	7,530,681
Preferred stock, shares outstanding	7,530,681	7,530,681
SeriesBPreferredStockMember
Shareholders' equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	1,000,000	1,000,000
Preferred stock, shares outstanding	502,160	502,160
SeriesCPreferredStockMember
Shareholders' equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	520,000	520,000
Preferred stock, shares issued	520,000	520,000
Preferred stock, shares outstanding	520,000	520,000
SeriesDPreferredStockMember
Shareholders' equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	636,400	636,400
Preferred stock, shares issued	520,000	520,000
Preferred stock, shares outstanding	520,000	520,000