Intangible Assets, Net - Details of Intangible Assets (Detail) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Total, at cost		$ 15,754	$ 13,805
Less: accumulated amortization		(5,176)	(3,169)
Intangible assets, net		10,578	10,636
Anchor Tenant Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Total, at cost	[1]	1,761	1,761
Leases Acquired In Place [Member]
Finite-Lived Intangible Assets [Line Items]
Total, at cost		3,579	4,215
Policy Renewal Rights [Member] | United [Member]
Finite-Lived Intangible Assets [Line Items]
Total, at cost		10,100	7,634
Non-compete Agreements [Member] | United [Member]
Finite-Lived Intangible Assets [Line Items]
Total, at cost	[2]	$ 314	$ 195

[1] An anchor tenant is a tenant that attracted more customers than other tenants.

[2] $119 was fully amortized in June 2022 and $195 was fully amortized in June 2021.