CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Series A Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Series A Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Series A Preferred stock, shares issued (in shares)	80,623	80,718
Series A Preferred stock, shares outstanding (in shares)	80,623	80,718
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	195,000,000	195,000,000
Common stock, shares issued (in shares)	93,253,570	93,230,848
Common stock, shares outstanding (in shares)	88,467,049	88,844,327