Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator:
Net income attributable to controlling interests	$ 15.1	$ 16.9	$ 45.3	$ 42.5
Denominator:
Weighted-average shares of common stock outstanding—basic (in shares)	35,806,742	37,070,795	36,354,715	37,891,015
Potential shares of common stock:
Weighted-average shares of common stock outstanding—diluted (in shares)	35,846,621	37,794,164	36,379,908	38,585,072
Earnings per share of common stock attributable to controlling interests:
Basic (in dollars per share)	$ 0.42	$ 0.46	$ 1.25	$ 1.12
Diluted (in dollars per share)	$ 0.42	$ 0.45	$ 1.25	$ 1.10
Restricted stock units
Potential shares of common stock:
Restricted stock units/Employee stock options (in shares)	39,879	22,449	25,193	17,803
Employee stock options
Potential shares of common stock:
Restricted stock units/Employee stock options (in shares)	0	700,920	0	676,254