v3.26.3
INVESTMENT IN UNCONSOLIDATED ENTITIES - Additional Information (Details)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Sep. 30, 2026
USD ($)
ft²
a
building
individual
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
ft²
a
building
individual
Sep. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
a
ft²
Dec. 31, 2025
USD ($)
Schedule of Equity Method Investments [Line Items]              
Land sale and related party land sale revenues   $ 14,098,000 $ 12,959,000 $ 40,584,000 $ 32,737,000    
Area of land (in acres) | a           50  
Equity method investments   89,178,000   89,178,000     $ 153,087,000
Equity in earnings (losses) from unconsolidated entities   (2,183,000) 70,137,000 38,702,000 158,721,000    
Land sales              
Schedule of Equity Method Investments [Line Items]              
Land sale and related party land sale revenues   $ 0 $ (12,000) (1,422,000) 70,000    
Great Park              
Schedule of Equity Method Investments [Line Items]              
Distributions to holders of percentage interests       176,500,000 517,300,000    
Great Park | Land sales              
Schedule of Equity Method Investments [Line Items]              
Land sale and related party land sale revenues       165,800,000 630,700,000    
Great Park | Land sales | Related Party              
Schedule of Equity Method Investments [Line Items]              
Land sale and related party land sale revenues       $ 0 0    
Great Park | Homesites Sold              
Schedule of Equity Method Investments [Line Items]              
Land sale and related party land sale revenues         224,900,000    
Gateway Commercial Venture              
Schedule of Equity Method Investments [Line Items]              
Area of land (in acres) | a   73   73      
Number of buildings on campus | building   4   4      
Area of gateway campus | ft²   1,000,000   1,000,000      
Square footage of building | ft²           189,000  
Additional square footage development rights | ft²           189,000  
Gateway Commercial Venture | Five Point Gateway Campus              
Schedule of Equity Method Investments [Line Items]              
Purchase price           $ 88,500,000  
Purchase price cash portion           45,000,000.0  
Purchase price, note receivable           $ 43,500,000  
Great Park              
Schedule of Equity Method Investments [Line Items]              
Percentage of equity ownership   37.50%   37.50%      
Return of investment       $ 66,200,000 194,000,000.0    
Equity method investments   $ 70,723,000   70,723,000     100,953,000
Equity in earnings (losses) from unconsolidated entities       35,956,000 157,094,000    
Gateway Commercial Venture              
Schedule of Equity Method Investments [Line Items]              
Return of investment $ 33,100,000            
Equity method investments   $ 0   0     32,800,000
Equity in earnings (losses) from unconsolidated entities       $ 700,000 1,000,000.0    
Gateway Commercial Venture | Five Point Office Venture Holdings I, LLC Acquisition              
Schedule of Equity Method Investments [Line Items]              
Percentage of equity ownership   75.00%   75.00%      
Number of individuals entitled to be appointed to executive committee | individual   2   2      
Hearthstone Venture Funds              
Schedule of Equity Method Investments [Line Items]              
Equity method investments   $ 18,400,000   $ 18,400,000     $ 18,900,000
Equity in earnings (losses) from unconsolidated entities       $ 1,500,000 $ 200,000    
Hearthstone Venture Funds | Minimum              
Schedule of Equity Method Investments [Line Items]              
Percentage of equity ownership   1.00%   1.00%      
Hearthstone Venture Funds | Maximum              
Schedule of Equity Method Investments [Line Items]              
Percentage of equity ownership   3.00%   3.00%