XML 134 R102.htm IDEA: XBRL DOCUMENT v3.3.1.900
Equity - Preferred Stock Additional Information (Details) - $ / shares
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Class of Stock [Line Items]    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
7.0% Convertible perpetual preferred stock    
Class of Stock [Line Items]    
Preferred stock converted (in shares) 230,500  
Common Stock    
Class of Stock [Line Items]    
Shares of common stock issued related to conversion of preferred stock (in shares) 2,968,000 18,423,000