XML 66 R55.htm IDEA: XBRL DOCUMENT v3.19.1
Long-Term Debt (Schedule of Debt) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Long-term debt    
Long-term debt $ 293,396 $ 294,446
Convertible Senior Notes Due 2020    
Long-term debt    
Senior Secured Notes 181,426 181,426
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net 5,138 6,358
Net carrying value 186,564 187,784
Senior Secured Notes Due 2024    
Long-term debt    
Senior Secured Notes 110,000 110,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net (3,168) (3,338)
Net carrying value $ 106,832 $ 106,662