Segment Reporting - Revenues and Profit (loss) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Revenues	$ 65,923	$ 15,416	$ 92,973	$ 25,695
Profit (Loss)	14,158	(9,531)	54,979	(57,272)
Equity in earnings (losses) from unconsolidated entities	(622)	(4,265)	52,554	(4,654)
Great Park Venture
Segment Reporting Information [Line Items]
Equity in earnings (losses) from unconsolidated entities			53,072	(5,634)
Gateway Commercial Venture
Segment Reporting Information [Line Items]
Equity in earnings (losses) from unconsolidated entities			(1,018)	97
Operating Segments
Segment Reporting Information [Line Items]
Revenues	71,353	52,800	471,774	111,438
Profit (Loss)	19,034	(15,014)	193,115	(24,012)
Corporate and Unallocated
Segment Reporting Information [Line Items]
Profit (Loss)	(5,962)	(8,309)	(22,028)	(47,252)
Valencia
Segment Reporting Information [Line Items]
Revenues	61,256	3,082	62,972	6,809
Valencia \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	61,256	3,082	62,972	6,809
Profit (Loss)	19,614	(543)	12,637	(8,314)
San Francisco
Segment Reporting Information [Line Items]
Revenues	165	226	489	528
San Francisco \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	165	226	489	528
Profit (Loss)	(862)	(672)	(2,777)	(2,155)
Great Park Venture
Segment Reporting Information [Line Items]
Revenues	4,392	12,000	29,191	18,046
Equity in earnings (losses) from unconsolidated entities	(412)	(4,540)	53,072	(5,634)
Great Park Venture \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	7,668	47,195	401,663	97,541
Profit (Loss)	640	(13,791)	184,291	(13,984)
Great Park Venture \| Segment Reconciling Items
Segment Reporting Information [Line Items]
Revenues	(3,276)	(35,195)	(372,472)	(79,495)
Profit (Loss)	1,381	18,303	(169,519)	19,658
Gateway Commercial Venture
Segment Reporting Information [Line Items]
Equity in earnings (losses) from unconsolidated entities	(351)	(87)	(1,018)	97
Gateway Commercial Venture \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,264	2,297	6,650	6,560
Profit (Loss)	(358)	(8)	(1,036)	441
Gateway Commercial Venture \| Segment Reconciling Items
Segment Reporting Information [Line Items]
Revenues	(2,154)	(2,189)	(6,329)	(6,248)
Profit (Loss)	$ 468	$ 116	$ 1,357	$ (129)