XML 36 R25.htm IDEA: XBRL DOCUMENT v3.4.0.3
Convertible Senior Notes (Tables)
 3 Months Ended
Mar. 31, 2016
Convertible Senior Notes.  
Summary of convertible notes

Liability component

 

March 31, 2016

 

December 31,
2015

 

 

 

(in thousands)

 

Principal

 

$
150,000

 

$
150,000

 

Less: Debt issuance costs

 
(2,688

)
(2,760

)

Less: Debt discount, net(1)

 
(53,946

)
(55,392

)

 

 

 

 

 

 

Net carrying amount

 

$
93,366

 

$
91,848

 

 

 

 

 

 

 

 

 

 

(1) Included in the consolidated balance sheets within convertible senior notes (due 2022) and amortized to interest expense over the remaining life of the Convertible Notes using the effective interest rate method.

Summary of interest expense recognized related to the Convertible Notes

 

 

 

Three Months Ended March 31,

 

 

 

2016

 

2015

 

 

 

(in thousands)

 

Contractual interest expense

 

$
1,116 

 

$

—

 

Amortization of debt issuance costs

 
72 

 

—

 

Amortization of debt discount

 
1,446 

 

—

 

 

 

 

 

 

 

Total

 

$
2,634 

 

$

—

 

 

 

 

 

 

 

 

 

Effective interest rate of the liability component

 
11.0 

%

—