Convertible Senior Notes and Capped Call Transactions - Schedule of Net Carrying Amount (Details) - Convertible Senior Notes Due 2026 - Convertible Debt - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Principal	$ 625,000,000	$ 625,000,000
Unamortized debt discount and issuance costs	(15,234,000)	(16,043,000)
Net carrying amount	$ 609,766,000	$ 608,957,000

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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Face (par) amount of debt instrument at time of issuance.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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