Commitments And Contingencies (Narrative) (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2016 USD ($) claim	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) claim	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number | claim	1,000		1,000
Loss Contingency Accrual, Period Increase (Decrease)				$ (32,600)
Adjustment to self insurance reserves	$ (55,200)	$ (29,600)	$ (55,200)	(62,200)	$ 69,300
Increase (Decrease) in Self Insurance Reserve				(29,600)
Operating lease rent expense			33,000	27,700	25,300
Accrued liabilities for outstanding community development district obligations	8,875	11,964	8,875	11,964
Letters of credit outstanding, amount	219,100	191,300	219,100	191,300
Surety Bonds Outstanding	1,100,000	1,000,000	1,100,000	1,000,000
Charges related to contractual dispute			$ 15,000	20,000
Maximum product warranty in years			10 years
Self-insurance liabilities	$ 831,058	$ 924,563	$ 831,058	$ 924,563	$ 995,692
Incurred but not reported percentage of liability reserves	70.00%	74.00%	70.00%	74.00%