Debt (Tables)
 3 Months Ended
Mar. 31, 2015
Outstanding Convertible Debt and Related Deferred Financing Costs
The Company had outstanding convertible debt and related deferred financing costs on its consolidated balance sheet as follows (in thousands): 
 
As of
 
March 31,
2015
 
December 31, 2014
Principal amount of the 2% Convertible Senior Notes
$
201,250

 
$
201,250

Unamortized debt discount
(30,655
)
 
(32,256
)
Long-term debt, net of discount
$
170,595

 
$
168,994

Deferred financing costs
$
4,693

 
$
4,974
Interest and Other Expense
Interest expense related to the 3.75% Notes (as defined below) and the 2% Notes was included in interest and other expense on the consolidated statements of operations as follows (in thousands): 
 
Three Months Ended March 31,
 
2015
 
2014
Contractual coupon interest
$
1,006

 
$
1,348

Accretion of debt discount
1,601

 
2,625

Amortization of debt issuance costs
282

 
146

Total interest and other expense
$
2,889

 
$
4,119