XML 37 R26.htm IDEA: XBRL DOCUMENT v3.19.2
Convertible Senior Notes (Tables)
6 Months Ended
Jun. 30, 2019
Debt Disclosure [Abstract]  
Summary of Net Carrying Amount of Liability Component and Equity Component of Notes
The net carrying amount of the liability component of the Notes was as follows (in thousands):
 
June 30, 2019
Principal
$
460,000

Unamortized discount
(76,927
)
Unamortized issuance cost
(6,490
)
Net carrying amount
$
376,583


Schedule of Interest Expense Recognized Related to Notes
The following table sets forth the interest expense recognized related to the Notes (in thousands):
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2019
 
2018
 
2019
 
2018
Amortization of debt discount
$
4,700

 
$
4,474

 
$
9,343

 
$
5,756

Amortization of debt issuance costs
349

 
310

 
688

 
398

Total interest expense related to the Notes
$
5,049

 
$
4,784

 
$
10,031

 
$
6,154