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Convertible Senior Notes - 2024 Notes (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021	May 02, 2017
Debt Instrument [Line Items]
Net Carrying Amount	$ 169,200,000	$ 0
Net Carrying Amount	0	335,100,000
2.25% Convertible senior notes due 2024
Debt Instrument [Line Items]
Principal Amount	170,400,000	381,200,000	$ 517,500,000
Unamortized Debt, Discount	0	(43,200,000)
Unamortized Debt, Issuance Costs	(1,200,000)	(2,900,000)
Net Carrying Amount	169,200,000
Net Carrying Amount		335,100,000
Fair Value, Amount	$ 238,300,000	$ 464,700,000

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- Definition

The portion of the carrying value of long-term convertible debt as of the balance sheet date that is scheduled to be repaid within one year or in the normal operating cycle if longer. Convertible debt is a financial instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Carrying amount of long-term convertible debt as of the balance sheet date, net of the amount due in the next twelve months or greater than the normal operating cycle, if longer. The debt is convertible into another form of financial instrument, typically the entity's common stock.

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