Quarterly report pursuant to Section 13 or 15(d)

Debt (Summary) (Details)

v3.7.0.1
Debt (Summary) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Dec. 15, 2014
Outstanding debt obligations      
Convertible Notes carrying value $ 154,146 $ 152,575  
Term notes 70,448 100,409  
Convertible Notes      
Outstanding debt obligations      
Face amount 172,500 172,500  
Unaccredited discount on Convertible Notes (15,812) (17,149) $ (27,500)
Unamortized issuance costs (2,542) (2,776)  
Convertible Notes carrying value 154,146 152,575  
Term Notes      
Outstanding debt obligations      
Face amount 108,138 142,000  
Unamortized issuance costs (2,469) (3,665)  
Term notes 105,669 $ 138,335  
Revolving credit facility balance 108,138    
Credit Agreement      
Outstanding debt obligations      
Revolving credit facility balance $ 25,000