Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

v3.8.0.1
CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Stockholders' Equity    
Preferred stock par value per share (in usd per share) $ 0.01 $ 0.01
Preferred shares authorized (in shares) 50,000,000 50,000,000
Common stock par value per share (in usd per share) $ 0.01 $ 0.01
Common shares authorized (in shares) 450,000,000 450,000,000
Common shares issued (in shares) 174,496,587 173,826,163
Common shares outstanding (in shares) 174,496,587 173,826,163
Assets of consolidated Variable Interest Entities $ 0 $ 3,290,245
Liabilities of consolidated Variable Interest Entities $ 0 $ 3,058,278
Series A Preferred Stock [Member]    
Stockholders' Equity    
Preferred stock par value per share (in usd per share) $ 0.01  
Preferred stock dividend rate 8.125% 0.00%
Preferred shares issued (in shares) 5,750,000 0
Preferred shares outstanding (in shares) 5,750,000 0
Preferred stock liquidation preference $ 143,750 $ 0
Series B Preferred Stock [Member]    
Stockholders' Equity    
Preferred stock par value per share (in usd per share) $ 0.01  
Preferred stock dividend rate 7.625% 0.00%
Preferred shares issued (in shares) 11,500,000 0
Preferred shares outstanding (in shares) 11,500,000 0
Preferred stock liquidation preference $ 287,500 $ 0
Series C Preferred Stock [Member]    
Stockholders' Equity    
Preferred stock par value per share (in usd per share) $ 0.01  
Preferred stock dividend rate 7.25% 0.00%
Preferred shares issued (in shares) 11,800,000 0
Preferred shares outstanding (in shares) 11,800,000 0
Preferred stock liquidation preference $ 295,000 $ 0