Annual report pursuant to Section 13 and 15(d)

Debt Instruments (Tables)

v3.8.0.1
Debt Instruments (Tables)
 12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]  
Schedule of long-term debt Long-term debt, net consisted of the following:

 
As of December 31,
 
2016
 
2017
 
(in thousands)
1.75% convertible senior notes due 2020
$
345,000

 
$
345,000

Credit facility
90,000

 
—

Unamortized discount and deferred issuance costs
(92,753
)
 
(71,986
)
Long-term debt, net
$
342,247

 
$
273,014

Summary of the effective interest rate, contractually stated interest expense and costs related to amortization of discount for the Notes The following table outlines the effective interest rate, contractually stated interest expense and costs related to the amortization of the discount for the Notes:

 
Year ended December 31,
 
2016
2017
 
(in thousands except for effective interest rate)
Effective interest rate
10.18
%
10.18
%
Contractually stated interest expense
$
6,046

$
6,029

Amortization of discount
$
18,315

$
20,153