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Convertible Senior Notes and Capped Call Transactions (Tables)
 6 Months Ended
Jun. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Carrying Amount of Liability Component of Convertible Debt
The net carrying amount of the liability component of the Notes as of June 30, 2022 (post-ASU 2020-06 adoption) and as of December 31, 2021 (pre-ASU 2020-06 adoption) was as follows:
June 30,
2022		December 31,
2021
(In thousands)
Principal$747,500 $747,500 
Unamortized discount— (162,960)
Unamortized issuance costs(11,970)(10,302)
Net carrying amount
$735,530 $574,238 
Schedule of Carrying Amount of Equity Component of Convertible Debt
The net carrying amount of the equity component of the Notes as of June 30, 2022 (post-ASU 2020-06 adoption) and as of December 31, 2021 (pre-ASU 2020-06 adoption) was as follows:
June 30,
2022		December 31,
2021
(In thousands)
Proceeds allocated to the conversion options (debt discount)$— $215,434 
Issuance costs— (5,783)
Net carrying amount
$— $209,651 
Schedule of Interest Expense Incurred
The following table sets forth the interest expense recognized related to the Notes:
Three Months EndedSix Months Ended
June 30,June 30,
2022202120222021
(In thousands)
Contractual interest expense$432 $432 $863 $863 
Amortization of issuance costs944 619 1,885 1,228 
Amortization of debt discount— 8,256 — 16,374 
Total interest expense$1,376 $9,307 $2,748 $18,465