Long-term Debt (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Summary of Long-Term Debt

	September 30, 2021		December 31, 2020
	(In millions)
Term loan, bearing interest at variable rates (rate of 1.83% as of September 30, 2021), maturing in September 2023	$	288.8	$	308.5
Unamortized deferred financing costs	(0.9)		(1.4)
Total senior debt	287.9		307.1
Convertible senior notes, bearing interest at 2.25% per annum, interest payments due in June and December, maturing in December 2023	145.9		300.0
Unamortized discount and deferred financing costs	(10.5)		(28.4)
Total convertible senior notes	135.4		271.6
Finance leases	43.9		45.6
Total other debt	43.9		45.6
Total debt, net of unamortized discount and deferred financing costs	467.2		624.3
Less: Amounts due within one year	(163.6)		(299.9)
Total long-term debt, net of unamortized discount and deferred financing costs	$	303.6	$	324.4

The following table summarizes information regarding the 2¼% Notes (in millions, except years, percentages, conversion rate, and conversion price):

	September 30, 2021			December 31, 2020
Carrying amount of equity component, net of equity issuance costs	$	—		$	54.5
Remaining amortization period (years)	2.25			3.0
Effective interest rate	5.8		%	5.8		%
Conversion rate (shares of common stock per $1,000 principal amount)	38.4615			38.4615
Conversion price (per share of common stock)	$	26.00		$	26.00

The following table presents the interest expense components for the 2¼% Notes:

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
	(In millions)
Interest expense-contractual interest	$	0.8	$	1.7	$	2.4	$	5.1
Interest expense-amortization of debt discount	1.0		2.0		3.2		5.9
Interest expense-amortization of deferred financing costs	0.1		0.2		0.3		0.5