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Long-term Debt and Other Financing (Tables)
6 Months Ended
Jun. 30, 2018
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments Debt balances at June 30, 2018 and December 31, 2017, are presented below:
 
June 30,
2018
 
December 31,
2017
Credit Facility
$
370.0

 
$
450.0

7.50% Senior Secured Notes due July 2023 (effective rate of 8.3%)
380.0

 
380.0

5.00% Exchangeable Senior Notes due November 2019 (effective rate of 10.8%)
150.0

 
150.0

7.625% Senior Notes due October 2021
406.2

 
406.2

6.375% Senior Notes due October 2025 (effective rate of 7.1%)
280.0

 
280.0

7.00% Senior Notes due March 2027
400.0

 
400.0

Industrial Revenue Bonds due 2020 through 2028
99.3

 
99.3

Unamortized debt discount and issuance costs
(48.9
)
 
(55.4
)
Total long-term debt
$
2,036.6

 
$
2,110.1