Fair Value - Narrative (Details)	3 Months Ended
	Sep. 30, 2022 USD ($)	Jul. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	$ 62,503,000		$ 77,959,000
Fair value assets level 2 to level 3 transfers amount	0
Contingent consideration liability	273,145,000		38,260,000
CarVal Investors, L.P.
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration liability	227,100,000	$ 227,100,000
Contingent consideration, liability, value, low	0
Contingent consideration, liability, value, high	$ 650,000,000
Revenue growth rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.020			0.020
Revenue growth rate | Minimum | CarVal Investors, L.P.
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.039
Revenue growth rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.839			0.839
Revenue growth rate | Maximum | CarVal Investors, L.P.
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.315
Revenue growth rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.115			0.130
Revenue growth rate | Weighted Average | CarVal Investors, L.P.
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.141
Discount rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.019			0.019
Discount rate | Minimum | CarVal Investors, L.P.
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.041
Discount rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.104			0.104
Discount rate | Maximum | CarVal Investors, L.P.
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.046
Discount rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.045			0.066
Discount rate | Weighted Average | CarVal Investors, L.P.
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability (as percent)	0.042
Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	$ 2,978,000		6,015,000
Mutual Fund | Other | Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	6,100,000		9,100,000
Start-up company
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	300,000		300,000
Equity method investee
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	0		2,900,000
Broker dealer exchange memberships
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	$ 2,700,000		$ 2,800,000