Schedule III—Real Estate and Accumulated Depreciation - Schedule of Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost
Initial Cost, Land	1,189,960
Initial Cost, Buildings and Improvements	1,114
Costs Capitalized Subsequent to Acquisition
Costs Capitalized Subsequent to Acquisition, Land	828,056
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,846
Gross Amounts at Which Carried at Close of Period
Gross Amounts at Which Carried at Close of Period, Land	2,018,016
Gross Amounts at Which Carried at Close of Period, Buildings and Improvements	2,960
Gross Amounts at Which Carried at Close of Period, Total	2,020,976	$ 1,919,777	$ 1,726,059	$ 1,461,197
Accumulated Depreciation	1,891	$ 1,758	$ 1,587	$ 3,407
Aggregate cost of land and improvements for federal income tax purposes	2,200,000
Valencia (formerly Newhall Ranch)- Land under development
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Initial Cost, Land	111,172
Initial Cost, Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Costs Capitalized Subsequent to Acquisition, Land	656,150
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	0
Gross Amounts at Which Carried at Close of Period
Gross Amounts at Which Carried at Close of Period, Land	767,322
Gross Amounts at Which Carried at Close of Period, Buildings and Improvements	0
Gross Amounts at Which Carried at Close of Period, Total	767,322
Accumulated Depreciation	0
Candlestick and The San Francisco Shipyard- Land under development
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Initial Cost, Land	1,038,154
Initial Cost, Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Costs Capitalized Subsequent to Acquisition, Land	185,383
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	0
Gross Amounts at Which Carried at Close of Period
Gross Amounts at Which Carried at Close of Period, Land	1,223,537
Gross Amounts at Which Carried at Close of Period, Buildings and Improvements	0
Gross Amounts at Which Carried at Close of Period, Total	1,223,537
Accumulated Depreciation	0
Agriculture- Operating property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Initial Cost, Land	40,634
Initial Cost, Buildings and Improvements	1,114
Costs Capitalized Subsequent to Acquisition
Costs Capitalized Subsequent to Acquisition, Land	(13,477)
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,846
Gross Amounts at Which Carried at Close of Period
Gross Amounts at Which Carried at Close of Period, Land	27,157
Gross Amounts at Which Carried at Close of Period, Buildings and Improvements	2,960
Gross Amounts at Which Carried at Close of Period, Total	30,117
Accumulated Depreciation	$ 1,891