Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity Preferred Stock (Details)

v3.7.0.1
Stockholders' Equity Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Class of Stock [Line Items]      
Preferred Stock, Shares Issued 5,750,000   0
Preferred Stock, Dividend Rate, Percentage 8.125%    
Preferred Stock, Par or Stated Value Per Share $ 0.01   $ 0.01
Preferred Stock, Liquidation Preference Per Share $ 25.00    
Preferred Stock, Dividend Payment Rate, Variable Rate Spread 5.66%    
Preferred Stock, Redemption Price Per Share $ 25.00    
Proceeds from issuance of preferred stock, net of offering costs $ 138,872 $ 0  
Preferred Stock      
Class of Stock [Line Items]      
Shares Issued, Price Per Share $ 25.00    
Public Offering [Member]      
Class of Stock [Line Items]      
Preferred Stock, Shares Issued 5,000,000    
Over-Allotment Option [Member]      
Class of Stock [Line Items]      
Preferred Stock, Shares Issued 750,000