Organization and Description of the Business - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Organization and description of the business
Stock repurchase program, authorized amount		$ 100.0
Repurchase of common stock (in shares)	4,445,534	268,800	4,147,450
Average price of common stock repurchased (in dollars per share)	$ 21.32	$ 19.03	$ 24.09
Repurchase of ordinary shares	$ 94.9	$ 5.1	$ 100.0
Consolidated Entity Excluding Consolidated Funds | Additional paid-in capital
Organization and description of the business
Repurchase of ordinary shares	0.4	0.3
Consolidated Entity Excluding Consolidated Funds | Retained earnings (deficit)
Organization and description of the business
Repurchase of ordinary shares	95.2	$ 4.8	$ 103.2
Repurchase of ordinary shares, excluding excise tax	$ 94.5
Acadian Asset Management Inc | Paulson
Organization and description of the business
Parent owned interest	23.90%