Share-Based Compensation - RSU and RSA activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
RSUs
RSU and RSA activity ( including Performance RSUs and RSAs)
Outstanding at beginning of year	4,109,847
Granted (in shares)	2,228,184
Released (in shares)	(1,651,141)
Forfeited (in shares)	(691,140)
Outstanding at end of year	3,995,750	4,109,847
Additional disclosures
Total estimated fair value of RSUs vested	$ 17.3	$ 37.2
Performance-Contingent Awards - RSAs
RSU and RSA activity ( including Performance RSUs and RSAs)
Granted (in shares)	165,000