Condensed Combined Balance Sheets for LLCs/LPs Accounted Under Equity Method (Parenthetical) (Detail) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Schedule Of Equity Method Investments [Line Items]
Right-of-use land assets	$ 10,925,000	$ 10,946,000
Right-of-use land liabilities	10,925,000	10,946,000
Limited Liability Companies
Schedule Of Equity Method Investments [Line Items]
Right-of-use land assets	649,000	651,000
Right-of-use land liabilities	$ 649,000	$ 651,000