Investment In Unconsolidated Entities - Unobservable Inputs Used to Determine Fair Value (Details) - Great Park Venture $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($) numberOfHomesites
Schedule of Equity Method Investments [Line Items]
Average annual absorption of homesites (market rate homesites) | numberOfHomesites	900
Unlevered discount rate	9.00%
Minimum
Schedule of Equity Method Investments [Line Items]
Annual home price appreciation	0.00%
Annual horizontal development cost appreciation	0.00%
Average annual absorption of homesites (market rate homesites)	$ 640
Maximum
Schedule of Equity Method Investments [Line Items]
Annual home price appreciation	7.00%
Annual horizontal development cost appreciation	3.00%
Average annual absorption of homesites (market rate homesites)	$ 1,300