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Condensed Combined Balance Sheets for LLCs/LPs Accounted Under Equity Method (Parenthetical) (Detail) - USD ($)
Mar. 31, 2024
Dec. 31, 2023
Schedule Of Equity Method Investments [Line Items]    
Right-of-use land assets $ 10,939,000 $ 10,946,000
Right-of-use land liabilities 10,939,000 10,946,000
Limited Liability Companies    
Schedule Of Equity Method Investments [Line Items]    
Right-of-use land assets 652,000 651,000
Right-of-use land liabilities $ 652,000 $ 651,000