Commitments And Contingencies (Narrative) (Details) $ in Thousands		3 Months Ended					12 Months Ended
	Dec. 17, 2018 USD ($) transaction	Dec. 31, 2019 USD ($) claim	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2019 USD ($) claim	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items]
Insurance Settlements Receivable		$ 118,366			$ 152,987		$ 118,366	$ 152,987
Write-off of insurance receivables			$ 12,600	$ 11,600
Operating lease rent expense								33,600	$ 30,800
Letters of credit outstanding, amount		262,800			239,400		262,800	239,400
Surety Bonds Outstanding		$ 1,400,000			1,300,000		$ 1,400,000	1,300,000
Loss Contingency, Pending Claims, Number | claim		1,000					1,000
Self-insurance liabilities		$ 709,798			$ 737,013		$ 709,798	$ 737,013	758,812	$ 831,058
Incurred but not reported percentage of liability reserves		68.00%			65.00%		68.00%	65.00%
Adjustment to self insurance reserves		$ 31,100	$ 12,800			$ 37,900	$ (49,437)	$ (35,873)	(97,789)
Reserves provided					$ 16,200		(225)	$ 16,130	(50)
Operating Lease, Right-of-Use Asset		70,029					70,029
Operating Lease, Liability		$ 91,408					91,408
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability							17,600
Operating Lease, Payments							23,400
Lease, Cost							36,400
Variable Lease, Cost							6,700
Short-term Lease, Cost									9,600
Southeast [Member]
Loss Contingencies [Line Items]
Product Warranty Expense							14,800
Florida [Member]
Loss Contingencies [Line Items]
Product Warranty Expense									12,400
Other Homebuilding [Member]
Loss Contingencies [Line Items]
Write-off of insurance receivables							$ 22,600		$ 29,600
CTX Mortgage Company LLC [Member] | Lehman Complaint [Member]
Loss Contingencies [Line Items]
Damages sought, value	$ 261,000
RMBS Transactions - Alleged Violations [Member] | CTX Mortgage Company LLC [Member] | Lehman Complaint [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number Of Transactions | transaction	2
RMBS Transactions - Similar Indemnity Provisions [Member] | CTX Mortgage Company LLC [Member] | Lehman Complaint [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number Of Transactions | transaction	6