Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Condensed Consolidated Balance Sheets
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	2,508,945	2,508,945
Preferred stock, shares outstanding	2,508,945	2,508,945
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	650,000,000	650,000,000
Common stock, shares issued	202,758,722	202,041,900
Common stock, shares outstanding	202,713,574	202,041,900