Annual report pursuant to Section 13 and 15(d)

Convertible Senior Notes - Equity and Liability Components of Financing Arrangements (Details)

v3.20.4
Convertible Senior Notes - Equity and Liability Components of Financing Arrangements (Details) - Convertible Notes - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Notes Payable, Current and Noncurrent    
Principal amount of 2023 Notes outstanding $ 495,280 $ 750,000
Unamortized discount (including unamortized debt issuance cost) (52,987) (111,041)
Total long-term portion of notes payable 442,293 638,959
Carrying value of equity component of 2023 Notes 48,397 101,422
Fair value of convertible senior notes outstanding (Level 2) $ 466,053 $ 647,280