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Long-Term Debt (Tables)
6 Months Ended
Jun. 30, 2018
Debt Disclosure [Abstract]  
Schedule of Debt
Long-Term debt is summarized as follows:
 
 
June 30, 2018
 
December 31, 2017
Principal amount of 4.50% exchangeable senior notes due 2023
 
$
143,750

 
$

Less: debt discount and issuance costs, net
 
30,869

 

Net carrying amount of liability component
 
112,881

 

Other
 
265

 
267

     Subtotal
 
113,146

 
267

Less: current maturities
 
(108
)
 
(111
)
     Long-term debt
 
$
113,038

 
$
156

 
 
 
 
 
Equity component:
 
 
 
 
Equity component of exchangeable notes, net of issuance costs
 
$
26,699

 
$