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Convertible Senior Notes (Tables)
 12 Months Ended
Dec. 31, 2018
Carrying Value of Convertible Senior Notes
The carrying value of the Company’s convertible senior notes is as follows:
 
 
 
December 31,
 
 
 
2018
 
 
2017
 
 
 
(Amounts in thousands)
 
2.125% convertible senior notes due 2021:
 
 
 
 
 
 
 
 
Principal amount
 
$
114,989
 
 
$
115,000
 
Unamortized debt discount
 
 
(9,781
)
 
 
(13,395
)
Unamortized debt issuance costs
 
 
(1,720
)
 
 
(2,355
)
Total convertible senior notes
 
$
103,488
 
 
$
99,250