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Debt (Tables) | 9 Months Ended
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Sep. 30, 2018
Debt Disclosure [Abstract] |
Schedule of Components of Long-term Debt | Long-term debt is comprised of the following:
|  | September 30, 2018 |  | December 31, 2017
10.75% senior secured notes due April 15, 2022 ($440.0 million face value less unamortized discount and fees of $8.6 million and $10.4 million at September 30, 2018 and December 31, 2017, respectively) |  | $ | 431.4 |  |  | $ | 429.6 |
5.50% convertible senior notes due March 1, 2021 ($213.5 million face value less unamortized discount and fees of $21.3 million and $27.2 million at September 30, 2018 and December 31, 2017, respectively) |  | 192.2 |  |  | 186.3 |
Capital leases |  | 6.1 |  |  | 7.5 |
Other debt |  | 20.3 |  |  | 21.3 |
Total |  | 650.0 |  |  | 644.7 |
Less – current maturities |  | 9.9 |  |  | 10.8 |
Total long-term debt |  | $ | 640.1 |  |  | $ | 633.9 |
See Note 10 for the fair value of the notes.
Schedule of Interest Expense | Interest expense related to the 2021 notes for the three and nine month periods ended September 30, 2018 and 2017 was as follows:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Contractual interest coupon |  | $ | 2.9 |  |  | $ | 2.9 |  |  | $ | 8.8 |  |  | $ | 8.8 |
Amortization of debt discount |  | 1.7 |  |  | 1.6 |  |  | 4.9 |  |  | 4.5 |
Amortization of debt issuance costs |  | 0.3 |  |  | 0.3 |  |  | 0.9 |  |  | 0.9 |
Total |  | $ | 4.9 |  |  | $ | 4.8 |  |  | $ | 14.6 |  |  | $ | 14.2 |

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