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Leases - Narrative (Details)			3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 15, 2025 USD ($) ft²	May 01, 2025 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Nov. 01, 2022
Operating Leased Assets [Line Items]
Total present value of lease payments			$ 29,207,000		$ 29,207,000
Right-of-use asset			16,419,000		16,419,000		$ 14,512,000
Lease liability			25,544,000		25,544,000
Office Space In London, United Kingdom
Operating Leased Assets [Line Items]
Lease term	60 months
Area of operating lease (in sq ft) | ft²	2,742
Monthly base payments	$ 34,481
Total present value of lease payments	$ 1,600,000
Discount rate	6.90%
Right-of-use asset	$ 1,300,000
Lease liability	$ 1,300,000
Office Space In Miami, Florida
Operating Leased Assets [Line Items]
Lease term		66 months
Total present value of lease payments		$ 2,800,000
Discount rate		6.80%
Right-of-use asset		$ 2,700,000
Lease liability		$ 2,700,000
Rent-free period		5 months
Office Space In New York City
Operating Leased Assets [Line Items]
Sublease income			500,000	$ 500,000	1,600,000	$ 1,600,000
Office Space In New York City | Accounts receivable, net
Operating Leased Assets [Line Items]
Sublease income					1,000,000.0		$ 1,300,000
Office Space In Chicago
Operating Leased Assets [Line Items]
Sublease income			$ 100,000	$ 100,000	$ 300,000	$ 300,000
Sublease term								5 years
Maximum
Operating Leased Assets [Line Items]
Remaining lease term			9 years		9 years
Maximum | Office Space In Miami, Florida
Operating Leased Assets [Line Items]
Monthly base payments		$ 59,773
Minimum | Office Space In Miami, Florida
Operating Leased Assets [Line Items]
Monthly base payments		$ 51,567

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