XML 45 R32.htm IDEA: XBRL DOCUMENT v3.8.0.1
Convertible Senior Notes (Tables)
12 Months Ended
Dec. 31, 2017
Carrying Value of Convertible Senior Notes

The carrying value of the Company’s convertible senior notes is as follows:

 

     December 31, 2017      December 31, 2016  

2.125% Convertible Senior Notes due 2021:

     

Principal amount

   $ 115,000      $ 115,000  

Unamortized debt discount

     (13,395      (16,777

Unamortized debt issuance costs

     (2,355      (2,951
  

 

 

    

 

 

 

Total convertible senior notes

   $ 99,250      $ 95,272