Annual report pursuant to Section 13 and 15(d)

Debt (Summary) (Details)

v3.6.0.2
Debt (Summary) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Nov. 19, 2015
Dec. 15, 2014
Outstanding debt obligations        
Convertible debt, total $ 152,575 $ 146,418    
Term notes 100,409 138,335    
Convertible Notes        
Outstanding debt obligations        
Face amount 172,500 172,500   $ 172,500
Unaccredited discount on Convertible Notes (17,149) (22,367)   $ (27,500)
Unamortized issuance costs (2,776) (3,715)    
Convertible debt, total 152,575 146,418    
Term Notes        
Outstanding debt obligations        
Face amount 142,000 150,000 $ 160,000  
Unamortized issuance costs (3,665) (5,601)    
Term notes $ 138,335 $ 144,399