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Debt (Tables)
 9 Months Ended
Sep. 30, 2017
Debt Disclosure [Abstract]  
Schedule of Components of Long-term Debt
Long-term debt is comprised of the following:
 
 
September 30,
2017
 
December 31, 2016
10.75% senior secured notes due April 15, 2022 ($440.0 million face value less unamortized discount and fees of $11.0 million at September 30, 2017)
 
$
429.0

 
$
—

5.50% convertible senior notes due March 1, 2021 ($213.5 million face value less unamortized discount and fees of $29.1 million and $34.4 million at September 30, 2017 and December 31, 2016, respectively)
 
184.4

 
179.1

6.25% senior notes
 
—

 
94.7

Capital leases
 
7.8

 
10.1

Other debt
 
21.6

 
16.1

Total
 
642.8

 
300.0

Less – current maturities
 
11.3

 
106.0

Total long-term debt
 
$
631.5

 
$
194.0
Schedule of Interest Expense
Interest expense related to the 5.50% convertible notes due 2021 for the three and nine month periods ended September 30, 2017 and 2016 was as follows:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2017
 
2016
 
2017
 
2016
Contractual interest coupon
 
$
2.9

 
$
2.9

 
$
8.8

 
$
6.3

Amortization of debt discount
 
1.6

 
1.4

 
4.5

 
2.9

Amortization of debt issuance costs
 
0.3

 
0.3

 
0.9

 
0.7

Total
 
$
4.8

 
$
4.6

 
$
14.2

 
$
9.9