Summary of significant accounting policies and estimates (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 26, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		$ 634,504	$ 610,517
Carrying value of intangibles		$ 32,100	32,100
Cash equivalents maximum maturity period of highly liquid investments		90 days
Proceeds from Company sponsored Initial Public Offering	$ 126,500	$ 126,500	0	$ 0
Total funds	127,800
Investment from sponsor	1,300
Underwriting fees	2,500
Offering costs	$ 500
Net loss attributable to non-controlling interest		8
Redeemable noncontrolling interests		127,765	0	$ 0
Auction rate securities
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		31,804	30,701
Level 3
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		31,804	30,701
Level 3 | Auction rate securities
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		$ 31,804	$ 30,701
Minimum
Summary Of Significant Accounting Policies [Line Items]
Number of business days for related transactions		1 day
Minimum | Notes Receivable
Summary Of Significant Accounting Policies [Line Items]
Service period		3 years
Minimum | Property, Plant and Equipment
Summary Of Significant Accounting Policies [Line Items]
Service period		3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Number of business days for related transactions		2 days
Maximum | Notes Receivable
Summary Of Significant Accounting Policies [Line Items]
Service period		10 years
Maximum | Property, Plant and Equipment
Summary Of Significant Accounting Policies [Line Items]
Service period		7 years
Securities
Summary Of Significant Accounting Policies [Line Items]
Number of business days for related transactions		2 days
Commodities
Summary Of Significant Accounting Policies [Line Items]
Number of business days for related transactions		1 day