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Convertible Senior Notes - Convertible Notes (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	May 31, 2020
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (8,809)
Convertible debt \| Convertible senior notes
Debt Instrument [Line Items]
Principal amount	287,500	$ 287,500	$ 287,500
Unamortized debt issuance costs	(6,901)	(5,446)
Unamortized debt discount	0	(79,070)
Net carrying amount	280,599	202,984
Carrying amount of the equity component	$ 0	$ 85,803	$ 85,800

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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