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Segment Information (Operating Data By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Total revenues	$ 2,649,366	$ 2,131,058	$ 7,189,181	$ 5,782,796
Income before Income Taxes:
Income before income taxes	$ 384,688	268,249	1,018,049	530,062
West area gains on land sale transactions			(26,400)
Number of land sales	two
Adjustment to self insurance reserves			37,900	19,800
Write-off of insurance receivables		5,300		20,300
Northeast
Income before Income Taxes:
Income before income taxes	$ 18,938	21,046	53,408	(12,803)
Southeast
Income before Income Taxes:
Income before income taxes	51,920	45,109	146,735	117,749
Florida
Income before Income Taxes:
Income before income taxes	73,802	52,191	186,238	132,824
Product warranty expense				(12,300)
Midwest
Income before Income Taxes:
Income before income taxes	52,438	59,636	123,889	115,463
Texas
Income before Income Taxes:
Income before income taxes	55,382	42,727	136,777	122,045
West
Income before Income Taxes:
Income before income taxes	138,698	75,753	382,317	107,987
Other homebuilding
Income before Income Taxes:
Income before income taxes	(26,123)	(45,999)	(65,497)	(103,441)
Home sales
Income before Income Taxes:
Income before income taxes	365,055	250,463	963,867	479,824
Financial Services
Income before Income Taxes:
Income before income taxes	19,633	17,786	54,182	50,238
Total Homebuilding
Revenues:
Total revenues	2,597,746	2,084,106	7,038,859	5,646,801
Total Homebuilding | Northeast
Revenues:
Total revenues	185,614	168,371	518,676	425,275
Total Homebuilding | Southeast
Revenues:
Total revenues	451,600	393,905	1,271,730	1,104,149
Total Homebuilding | Florida
Revenues:
Total revenues	506,670	338,078	1,311,016	1,015,795
Total Homebuilding | Midwest
Revenues:
Total revenues	412,803	406,126	1,066,775	1,008,617
Total Homebuilding | Texas
Revenues:
Total revenues	347,986	269,997	925,317	793,207
Total Homebuilding | West
Revenues:
Total revenues	693,073	507,629	1,945,345	1,299,758
Financial Services
Revenues:
Total revenues	$ 51,620	$ 46,952	$ 150,322	$ 135,995

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