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Debt (Tables)
 9 Months Ended
Sep. 30, 2023
Debt Disclosure [Abstract]  
Schedule of Net Carrying Amount of Liability and Equity Component of Notes
The net carrying amount of the liability components of the Convertible Notes were as follows:
As of September 30,As of December 31,
20232022
2026 Convertible Notes:(In thousands)
Principal$175,000 $240,000 
Unamortized debt issuance costs(2,108)(3,805)
2026 Convertible Notes net carrying amount172,892 236,195 
2028 Convertible Notes:
Principal250,000 250,000 
Unamortized debt issuance costs(4,850)(5,649)
2028 Convertible Notes net carrying amount245,150 244,351 
Total net carrying amount$418,042 $480,546 
Schedule of Interest Income and Interest Expense Disclosure
The following table sets forth the interest expense recognized related to the Convertible Notes:
Three months ended September 30,Nine months ended September 30,
2023202220232022
2026 Convertible Notes:(In thousands)
Contractual interest expense$109 $250 $356 $750 
Amortization of debt issuance costs217 497 723 1,488 
Total interest expense related to the 2026 Convertible Notes326 747 1,079 2,238 
2028 Convertible Notes:
Contractual interest expense313 313 939 939 
Amortization of debt issuance costs267 266 797 796 
Total interest expense related to the 2028 Convertible Notes580 579 1,736 1,735 
Total interest expense$906 $1,326 $2,815 $3,973 
Schedule of Capped Call Transactions
The following table sets forth key terms and costs incurred for the Capped Calls related to the Convertible Notes:
2026 Convertible Notes2028 Convertible Notes
(In thousands, except share and per share amounts)
Initial approximate strike price per share, subject to certain adjustments$91.03 $179.27 
Initial cap price per share, subject to certain adjustments$137.40 $260.76 
Net costs incurred$43,320 $25,500 
Class A common stock covered, subject to anti-dilution adjustments4,394,276 1,394,525