Quarterly report pursuant to Section 13 or 15(d)

Equity Transactions (Details)

v3.7.0.1
Equity Transactions (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Dec. 19, 2016
Sep. 06, 2016
May 26, 2016
Apr. 25, 2016
Mar. 09, 2016
Feb. 04, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Class of Stock [Line Items]                      
Preferred stock dividend             $ 1,824 $ 1,823 $ 3,647 $ 3,647  
Proceeds from Issuance of common stock                 $ 0 $ 300,807  
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    
Value of a share of common stock (in dollars per share)             $ 10.61   $ 10.61    
Conversion ratio of preferred stock to common stock                 4.7    
Conversion of stock, shares converted (in shares)           120,000          
Preferred stock, shares issued (in shares)             1,458,948   1,458,948    
Preferred stock, shares outstanding (in shares)             1,458,948   1,458,948   1,458,948
Common Stock                      
Class of Stock [Line Items]                      
Conversion of stock, shares issued (in shares)           719,000          
Shares of common stock issued in public offering (in shares) 40,000,000 29,900,000   25,300,000 15,250,000            
Proceeds from Issuance of common stock $ 634,917 $ 421,864   $ 205,869 $ 94,948            
Common Stock | Big Star Transaction                      
Class of Stock [Line Items]                      
Shares of common stock issued in acquisition (in shares)     9,333,333                
Sales price of shares issued (in dollars per share)     $ 11.74