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Debt (Tables)
9 Months Ended
Sep. 30, 2018
Debt Disclosure [Abstract]  
Summary of Outstanding Debt
The following table summarizes our outstanding debt (in thousands):
 
September 30, 2018
 
December 31, 2017
5.00% Convertible Senior Notes due 2021
$
115,000

 
$
115,000

7.75% Senior Secured Notes due 2025
300,000

 
300,000

ABL Credit Facility

 

Principal amount of long-term debt
415,000

 
415,000

Less: unamortized discount and deferred financing costs
(25,402
)
 
(30,188
)
Total debt, net of unamortized discount and deferred financing costs
389,598

 
384,812

Less: current maturities

 

Long-term debt, net of current maturities
$
389,598

 
$
384,812