Debt, net of unamortized deferred financing cost - Narrative (Details) - USD ($)			3 Months Ended		6 Months Ended
	Feb. 22, 2024	Jan. 03, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Nov. 10, 2023
Debt Instrument [Line Items]
Borrowings on term notes and lines of credit					$ 53,612,000	$ 141,950,000
Debt, net of unamortized deferred financing cost			$ 163,986,000		163,986,000		$ 186,353,000
Warrant liabilities, at fair value			2,934,000		2,934,000		0
Gain (loss) on warrant liability			409,000	$ 76,000	69,000	$ (12,866,000)
Alvarium, TWMH And TIG
Debt Instrument [Line Items]
Borrowings on term notes and lines of credit		$ 124,400,000
Line of credit
Debt Instrument [Line Items]
Debt, net of unamortized deferred financing cost			163,986,000		163,986,000		186,353,000
Credit facility | Line of credit
Debt Instrument [Line Items]
Maximum borrowing capacity		250,000,000.0
Credit facility | Line of credit | Term Loans
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 100,000,000.0
Debt, net of unamortized deferred financing cost			37,978,000		37,978,000		92,603,000
Debt instrument, increase in basis spread on variable rate (in percent)	0.50%
Line of credit facility, commitment fee amount	$ 40,000,000
Credit facility | Line of credit | Term Loans | Minimum | Base rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Credit facility | Line of credit | Term Loans | Minimum | Secured overnight financing rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate		2.00%
Credit facility | Line of credit | Term Loans | Maximum | Base rate
Debt Instrument [Line Items]
Basis spread on variable rate		2.00%
Credit facility | Line of credit | Term Loans | Maximum | Secured overnight financing rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate		3.00%
Credit facility | Line of credit | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 150,000,000						$ 110,000,000
Accordion option, additional borrowing capacity		75,000,000.0
Accordion feature, maximum borrowing capacity		$ 225,000,000.0
Unfunded commitment			$ 14,000,000.0		$ 14,000,000.0		$ 16,300,000
Weighted average interest rate (in percent)			9.50%		9.50%		9.00%
Debt, net of unamortized deferred financing cost			$ 126,008,000		$ 126,008,000		$ 93,750,000
Reduced credit facility amount								$ 50,000,000