Convertible Senior Notes (Tables)
 9 Months Ended
Sep. 30, 2016
Debt Disclosure [Abstract]  
Schedule of Total Interest Expense Recognized Related to Notes

The following table sets forth total interest expense recognized related to the Notes during the three and nine months ended September 30, 2016 and 2015 (in thousands):

 

 

Three Months Ended September 30,

 

 

Nine Months Ended September 30,

 

 

 

2016

 

 

2015

 

 

2016

 

 

2015

 

Contractual interest expense

 

$

1,797

 

 

$

1,797

 

 

$

5,390

 

 

$

5,371

 

Amortization of debt issuance costs

 

 

311

 

 

 

302

 

 

 

928

 

 

 

900

 

Total interest expense

 

$

2,108

 

 

$

2,099

 

 

$

6,318

 

 

$

6,271