Quarterly report pursuant to Section 13 or 15(d)

Equity Transactions (Details)

v3.10.0.1
Equity Transactions (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
May 30, 2018
Dec. 19, 2016
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Class of Stock [Line Items]              
Preferred stock dividend     $ 1,824 $ 1,824 $ 3,647 $ 3,647  
Issuance of common stock         $ 288,357 $ 0  
Series A Preferred Stock              
Class of Stock [Line Items]              
Preferred stock cumulative cash dividends rate         10.00%    
Preferred stock, liquidation preference (in dollars per share)     $ 50.00   $ 50.00   $ 50.00
Preferred stock, dividend rate (in dollars per share)         5.00    
Common Stock              
Class of Stock [Line Items]              
Value of a share of common stock (in dollars per share)     $ 10.74   $ 10.74    
Conversion ratio of preferred stock to common stock         4.7    
Shares of common stock issued in public offering (in shares) 25,300,000 40,000,000          
Issuance of common stock $ 288,389 $ 634,934