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Convertible Senior Notes (Tables)

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Summary of Notes Net of Discount and Deferred Financing Costs

The following table presents a summary of the 2024 Notes as of March 31, 2023.

			Principal Amount						Unamortized Issuance Costs						Net Carrying Amount						Fair Value
(in millions)																					Amount						Leveling
2024 Notes			$	170.4					$	(0.9)					$	169.5					$	229.5					Level 2

The following table presents a summary of the 2024 Notes as of December 31, 2022.

			Principal Amount						Unamortized Issuance Costs						Net Carrying Amount						Fair Value
(in millions)																					Amount						Leveling
2024 Notes			$	170.4					$	(1.0)					$	169.4					$	268.0					Level 2

The following table presents a summary of the interest expense of the 2024 Notes.

			Three Months Ended March 31,
(in millions)			2023						2022
Coupon interest			$	0.9					$	2.2
Amortization of debt discount and issuance costs			0.2						0.4
Total interest expense			$	1.1					$	2.6

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Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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