XML 49 R31.htm IDEA: XBRL DOCUMENT v3.20.2
Convertible Senior Notes Due 2023 (Tables)
 6 Months Ended
Jun. 30, 2020
Debt Disclosure [Abstract]  
Summary of liability component of 2023 Notes
The liability component of the 2023 Notes consists of the following, (dollars in thousands):
June 30,
2020		December 31,
2019
(unaudited) 
2023 Notes$402,500  $402,500  
Unamortized debt discount and deferred financing costs(49,151) (57,330) 
Total carrying value$353,349  $345,170