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Share-based Compensation - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			878,091	868,315
Increase (decrease) in accrued employee compensation expense	$ 7.8	$ 6.1	$ 12.7	$ 12.0
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expense recognized	10.1	$ 10.1	20.3	$ 20.2
Unrecognized share-based compensation expense	$ 64.4		$ 64.4		$ 55.2
Weighted average period for compensation expense expected to be recognized			1 year 2 months 12 days	10 months 24 days
2015 Management Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			0	0
2015 Management Incentive Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Expiration period			10 years
2015 Management Incentive Plan | RSUs and RSAs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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