Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of Components of Long-term Debt

Long-term debt is comprised of the following:

As of December 31,	2021		2020
6.875% senior secured notes due November 1, 2027 (Face value of $485.0 million less unamortized issuance costs of $6.9 million and $8.1 million at December 31, 2021 and 2020, respectively)	$	478.1	$	476.9
5.50% convertible senior notes (Face value of $84.2 million less unamortized discount and issuance costs of $0.6 million at December 31, 2020)		—		83.6
Finance leases		2.7		5.5
Other debt		48.6		63.9
Total		529.4		629.9
Less – current maturities		18.2		102.8
Total long-term debt	$	511.2	$	527.1

Schedule of Estimated Fair Values of Long-term Debt

Presented below are the estimated fair values of long-term debt.

As of December 31,	2021		2020
6.875% senior secured notes due November 1, 2027	$	527.0	$	532.3
5.50% convertible senior notes due March 1, 2021		—		169.8

Schedule of Maturities of Long-term Debt, Including Finance Leases

Maturities of long-term debt, including finance leases, in each of the next five years and thereafter are as follows:

Year	Total		Long-Term Debt		Finance Leases
2022	$	18.2	$	16.6	$	1.6
2023		17.0		16.3		0.7
2024		10.3		9.9		0.4
2025		3.0		3.0		—
2026		1.9		1.9		—
Thereafter		479.0		479.0		—
Total	$	529.4	$	526.7	$	2.7

Schedule of Interest Expense

Cash paid for interest and capitalized interest expense was as follows:

Year ended December 31,	2021		2020		2019
Cash paid for interest	$	40.1	$	32.9	$	61.5
Capitalized interest expense	$	4.5	$	4.6	$	6.6

Interest expense related to the 2027 Notes is comprised of the following:

Year ended December 31,	2021		2020
Contractual interest coupon	$	33.3	$	5.7
Amortization of issuance costs		1.2		0.2
Total	$	34.5	$	5.9

Interest expense related to the 2022 Notes is comprised of the following:

Year ended December 31,	2020		2019
Contractual interest coupon	$	13.8	$	47.3
Amortization of issuance costs		0.7		2.4
Total	$	14.5	$	49.7

Interest expense related to the 2021 Notes is comprised of the following:

Year ended December 31,	2021		2020		2019
Contractual interest coupon	$	0.8	$	4.6	$	8.9
Amortization of debt discount		0.5		3.1		5.5
Amortization of debt issuance costs		0.1		0.5		0.9
Total	$	1.4	$	8.2	$	15.3