Investment In Unconsolidated Entities - Summarized Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Equity in (loss) earnings from Venture	$ (1,750)	$ (4,028)	$ 4,463	$ 1,368
Great Park Venture
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Land sale revenues			231,216	172,434
Cost of land sales			(153,486)	(118,113)
Other costs and expenses			(48,525)	(41,623)
Net income (loss) of Venture			29,205	12,698
The Company’s share of net income			10,952	4,762
Basis difference amortization			(3,694)	(3,406)
Equity in (loss) earnings from Venture			7,258	1,356
Gateway Commercial Venture
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Rental revenues			25,708	19,245
Rental operating and other expenses			(5,177)	(3,006)
Depreciation and amortization			(11,319)	(8,597)
Interest expense			(12,938)	(7,626)
Net income (loss) of Venture			(3,726)	16
Equity in (loss) earnings from Venture			$ (2,795)	$ 12