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Convertible Senior Notes (Tables)
 3 Months Ended
Mar. 31, 2020
Carrying Value of Convertible Senior Notes
The net carrying value of the liability component of the 2019 Notes is as follows:
                 
 
As of
 
 
March 31,
 
  
December 31,
 
 
2020
 
  
2019
 
 
(Amounts in thousands)
 
0.375% convertible senior notes due 2024:
 
 
 
  
 
 
Principal amount
  $
287,500
     $
287,500
  
Less: unamortized debt discount
   
(45,565
 )    
(47,921
 )
Less: unamortized debt issuance costs
   
(6,477
 )    
(6,812
 )
                 
Total debt
   
235,458
      
232,767
  
Less: current portion
   
—  
      
—  
  
                 
Net carrying amount
  $
235,458
     $
232,767
  
                 
 
 
 
 
 
 
Convertible Notes Equity Component
The net carrying value of the equity component of the 2019 Notes is as follows:
                 
 
March 31,
 
  
December 31,
 
 
2020
 
  
2019
 
 
 
(
Amounts in thousands)
 
Proceeds allocated to the conversion feature
  $
52,062
    $
52,062
 
Less: transaction costs allocated to the conversion feature
   
(1,621
 )    
(1,621
 )
Less: deferred taxes
   
(11,371
 )    
(11,371
 )
                 
Net carrying value
  $
39,070
    $
39,070