Annual report pursuant to Section 13 and 15(d)

Equity Transactions (Narrative) (Details)

v3.6.0.2
Equity Transactions (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 19, 2016
Sep. 06, 2016
May 26, 2016
Apr. 25, 2016
Mar. 09, 2016
Feb. 04, 2016
Nov. 16, 2015
Mar. 13, 2015
Sep. 15, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Class of Stock [Line Items]                        
Preferred stock dividend                   $ 7,295 $ 7,895 $ 7,895
Proceeds from issuance of common stock                   $ 1,357,577 $ 175,459 122,450
Series A Preferred Stock [Member]                        
Class of Stock [Line Items]                        
Preferred Stock, Dividend Rate, Percentage                   10.00%    
Preferred stock, liquidation preference (in dollars per share)                   $ 50.00 $ 50.00  
Preferred stock, dividend rate                   $ 5.00    
Preferred stock dividend                   $ 7,295 $ 7,895 $ 7,895
Preferred Stock, Shares Issued                   1,458,948    
Preferred stock, shares outstanding                   1,458,948 1,578,948  
Conversion of stock, shares converted           120,000            
Common Stock                        
Class of Stock [Line Items]                        
Value of a share of common stock                   $ 15.37    
Preferred stock shares issued upon conversion                   3.3    
Shares of common stock issued in public offering 40,000,000 29,900,000   25,300,000 15,250,000   12,000,000 9,000,000 12,500,000      
Sales price of shares issued     $ 11.74       $ 8.40 $ 6.55 $ 9.00      
Proceeds from issuance of common stock   $ 421,864   $ 205,869 $ 94,948   $ 109,864 $ 65,595 $ 122,450 $ 634,917    
Conversion of stock, shares issued           719,000            
Common Stock | Big Star Transaction [Member]                        
Class of Stock [Line Items]                        
Shares of common stock issued in acquisition     9,333,333                  
Common Stock | Over-Allotment Option [Member]                        
Class of Stock [Line Items]                        
Shares of common stock issued in public offering             1,800,000 1,350,000 1,875,000