Quarterly Results (Unaudited) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended					12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
land inventory impairment	$ 57,500		$ 31,500
Net realizable value adjustments (NRV) - land held for sale			81,000			$ 83,576	$ 1,105	$ (901)
Litigation Settlement, Expense							15,000	20,000
Impairment Losses Related to Real Estate Partnerships			8,000			$ 8,017	0	0
Write-off of insurance receivables	-9297	-5326		-15000		29624
Gain (Loss) Related to Litigation Settlement			$ 19,800
Loss on debt retirements						$ 0	657	0
Adjustment to self insurance reserves	$ 75,300				$ 55,200	(95,100)	(55,200)	(62,200)
Reserves provided						(50)	506	(11,433)
Home Office Relocation [Member]
Costs associated with the relocation of corporate headquarters							$ 8,300	$ 4,400
Florida [Member]
Product Warranty Expense						$ 12,400