Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.7.0.1
Consolidated Balance Sheets (Parenthetical) - $ / shares
Mar. 31, 2017
Dec. 31, 2016
Stockholders' equity:    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 300,000,000 300,000,000
Common stock, shares outstanding 201,054,884 201,041,320
Series A Preferred Stock [Member]    
Stockholders' equity:    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, liquidation preference (in dollars per share) $ 50.00 $ 50.00
Preferred stock, shares authorized 2,500,000 2,500,000
Preferred stock, shares outstanding 1,458,948 1,458,948