Deferred Acquisition Consideration (Details) - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance of contingent payments		$ 222,369	$ 17,847	$ 17,847
Payments		71,865		12,431
Redemption value adjustments		(13,793)		18,721
Additions		24,594		198,937
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)		(1,576)		0
Other		(140)		(705)
Ending balance of contingent payments	$ 159,589	159,589		222,369
Business Acquisition [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases		24,594		$ 198,937
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances	$ 42,356
MDC
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Additions			61
Business Acquisition [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases			61
Concentric, Targeted Victory and Instrument
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Additions			136
Business Acquisition [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases			$ 136
BNG
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Additions		22,014
Business Acquisition [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases		$ 22,014