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Fair Value of Financial Instruments - Schedule of carrying values and estimated fair values of debt instruments (Details) - Convertible Debt - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
1.00% Senior unsecured convertible notes, net (1)	$ 412,311	$ 411,863
Convertible senior notes, fair value	$ 329,375	$ 410,771

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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