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2.25% Convertible Senior Notes Due 2019 (Tables)
 3 Months Ended
Mar. 31, 2016
2.25% Convertible Senior Notes Due 2019 [Abstract]  
Carrying Amounts of Liability and Equity Components





 

 

 

 

 



March 31, 2016

 

December 31, 2015



(In thousands)

Amount of the equity component (1)

$

 45,808 

 

$

 45,808 



 

 

 

 

 

2.25% convertible senior notes due 2019

$

 330,000 

 

$

 330,000 

Unamortized debt discount (2)

 

 (31,966)

 

 

 (34,214)

Unamortized transaction costs related to the debt component

 

 (4,982)

 

 

 (5,309)

Contractual coupon interest accrual

 

 1,856 

 

 

 7,425 

Contractual coupon interest payment

 

 —

 

 

 (7,425)

Net carrying amount

$

 294,908 

 

$

 290,477 







(1)

Net of $1,177 thousands of transaction costs related to the equity component of the Notes.

(2)

As of March  31, 2016, the remaining period over which the unamortized debt discount will be amortized is 3.25 years.

 

Summary of Interest Expense for Contractual Interest and Accretion of Debt Discount



 

 

 

 

 



Period ended March 31,



 

 

 

 



2016

 

2015



(In thousands)

Contractual coupon interest expense

$

 1,856 

 

$

 1,856 

Amortization of debt discount

 

 2,248 

 

 

 2,128 

Amortization of debt issuance costs

 

 327 

 

 

 299 

Total interest expense related to Notes

$

 4,431 

 

$

 4,283