Investment In Unconsolidated Entities - Additional Information (Details) $ in Thousands		3 Months Ended								12 Months Ended
	Aug. 04, 2017 USD ($) individual	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Land sale revenues										$ 182,890	$ 46,616
Rental revenues		$ 146,906	$ 12,014	$ 12,387	$ 13,073	$ 7,945	$ 12,988	$ 13,090	$ 14,967	184,380	48,990	$ 139,431
Land sales
Schedule of Equity Method Investments [Line Items]
Land sale revenues										140,020	133	17,257
Affiliated Entity | Land sales
Schedule of Equity Method Investments [Line Items]
Land sale revenues										$ 923	900	87,556
Great Park
Schedule of Equity Method Investments [Line Items]
Percentage of equity ownership		37.50%								37.50%
Distribution to certain interest holders, aggregate		$ 355,000								$ 355,000
Great Park | Land sales
Schedule of Equity Method Investments [Line Items]
Land sale revenues										137,700
Great Park | Homesites Sold
Schedule of Equity Method Investments [Line Items]
Land sale revenues										31,000
Great Park | Affiliated Entity | Land sales
Schedule of Equity Method Investments [Line Items]
Land sale revenues										133,300	3,900	7,700
Great Park | Subsequent Event
Schedule of Equity Method Investments [Line Items]
Distribution to certain interest holders, aggregate													$ 76,300
Gateway Commercial Venture | Five Point Office Venture Holdings I, LLC Acquisition
Schedule of Equity Method Investments [Line Items]
Purchase price	$ 106,500
Percentage interest in venture	75.00%
Number of individuals entitled to be appointed to executive committee | individual	2
Gateway Commercial Venture | Affiliated Entity | Rental Revenue
Schedule of Equity Method Investments [Line Items]
Rental revenues										8,300	1,100
Great Park
Schedule of Equity Method Investments [Line Items]
Distributions entitled to be received										476,000
Potential additional distributions entitled to be received										$ 89,000
Percentage of equity ownership		37.50%								37.50%
Rental revenues										$ 0	0	0
Gateway Commercial Venture
Schedule of Equity Method Investments [Line Items]
Percentage of equity ownership		75.00%								75.00%
Rental revenues										$ 0	$ 0	$ 0