Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Deferred tax asset related to investments	$ 148,900,000	$ 102,300,000
Additions to deferred tax asset	177,200,000	117,300,000
Deferred tax asset related to U.S. federal net operating loss carryforwards	23,500,000
Deferred tax asset related to U.S. state net operating loss carryforwards	$ 4,800,000
Operating loss carryforward expiration year	2030
Unrecognized tax benefits	$ 0
Class A Shares
Operating Loss Carryforwards [Line Items]
Additions to deferred tax asset	$ 86,400,000	$ 89,000,000.0