Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net income attributable to controlling interests	$ 16.9	$ 19.6	$ 42.5	$ 43.0
Denominator:
Weighted-average shares of common stock outstanding—basic (in shares)	37,070,795	41,508,143	37,891,015	41,479,116
Potential shares of common stock:
Weighted-average shares of common stock outstanding—diluted (in shares)	37,794,164	42,589,717	38,585,072	42,648,805
Earnings per share of common stock attributable to controlling interests:
Basic (in dollars per share)	$ 0.46	$ 0.47	$ 1.12	$ 1.04
Diluted (in dollars per share)	$ 0.45	$ 0.46	$ 1.10	$ 1.01
Restricted stock units
Potential shares of common stock:
Restricted stock units/Employee stock options (in shares)	22,449	7,471	17,803	5,568
Employee stock options
Potential shares of common stock:
Restricted stock units/Employee stock options (in shares)	700,920	1,074,103	676,254	1,164,121