Quarterly report pursuant to Section 13 or 15(d)

Equity Preferred Stock (Details)

v3.7.0.1
Equity Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Class of Stock [Line Items]        
Preferred stock par value per share (in usd per share) $ 0.01 $ 0.01   $ 0.01
Proceeds from issuance of preferred stock, net of offering costs   $ 138,872 $ 0  
Preferred dividends declared   $ 4,285    
Series A Preferred Stock [Member]        
Class of Stock [Line Items]        
Preferred stock dividend rate   8.125%    
Preferred stock par value per share (in usd per share) 0.01 $ 0.01    
Preferred stock public offering price per share (in usd per share) 25.00 25.00    
Preferred stock liquidation preference per share (in usd per share) 25.00 $ 25.00    
Preferred stock dividend variable rate spread   5.66%    
Preferred stock redemption price per share (in usd per share) $ 25.00 $ 25.00    
Proceeds from issuance of preferred stock, net of offering costs   $ 138,872    
Preferred dividends declared $ 4,285      
Preferred dividends declared per share (in usd per share) $ 0.75043      
Series A Preferred Stock [Member] | Public Offering [Member]        
Class of Stock [Line Items]        
Number of shares of preferred stock issued during period (in shares)   5,000,000    
Series A Preferred Stock [Member] | Over-Allotment Option [Member]        
Class of Stock [Line Items]        
Number of shares of preferred stock issued during period (in shares)   750,000