Investment In Unconsolidated Entities Summarized Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Equity in earnings (loss) from Great Park Venture	$ 22,825	$ (297)		$ 17,584	$ (479)
Great Park Venture
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Land sale revenues			$ 18,297	465,416
Cost of land sales			(10,416)	(328,871)
Other costs and expenses			(75,013)	(23,060)
Net income (loss) of Great Park Venture			(67,132)	113,485
The Company’s share of net income (loss)			(25,175)	42,557
Basis difference (amortization) accretion			24,696	(24,835)
Equity in earnings (loss) from Great Park Venture			$ (479)	$ 17,722