Convertible Senior Notes - Net carrying amount (Details) - 2027 Notes - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Senior Convertible Notes
Principal	$ 690,000	$ 690,000	$ 690,000
Unamortized debt issuance costs	(12,105)	(12,887)
Convertible notes carrying amount, net	$ 677,895	$ 677,113