Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($)		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Gross profit:
Goodwill, Impairment Loss		$ 9,800,000	$ 0	$ 0
Interest expense		0	0	7,100,000
Income before income taxes	[1]	1,123,400,000	814,200,000	657,800,000
Income tax expense (benefit)		372,700,000	280,700,000	195,100,000
Net income		750,700,000	533,500,000	462,700,000
Other comprehensive income (loss), net of income tax:
Unrealized gain (loss) related to available-for-sale securities		(800,000)	300,000	1,700,000
Comprehensive income		$ 749,900,000	$ 533,800,000	$ 464,400,000
Earnings Per Share, Basic		$ 2.05	$ 1.57	$ 1.44
Net income per common share assuming dilution		2.03	1.50	1.33
Cash dividends declared per common share		$ 0.25	$ 0.1375	$ 0.1875
Homebuilding [Member]
Revenues:
Home sales		$ 10,469,400,000	$ 7,804,700,000	$ 6,024,800,000
Land/lot sales and other		89,600,000	53,800,000	61,100,000
Total revenues		10,559,000,000	7,858,500,000	6,085,900,000
Cost of sales:
Home sales		8,393,600,000	6,139,100,000	4,771,500,000
Land/lot sales and other		81,800,000	44,300,000	50,900,000
Production Related Impairments or Charges		60,300,000	85,200,000	31,100,000
Total cost of sales		8,535,700,000	6,268,600,000	4,853,500,000
Gross profit:
Home sales		2,075,800,000	1,665,600,000	1,253,300,000
Land/lot sales and other		7,800,000	9,500,000	10,200,000
Inventory and land option charges		(60,300,000)	(85,200,000)	(31,100,000)
Gross profit		2,023,300,000	1,589,900,000	1,232,400,000
Selling, general and administrative expense		1,013,600,000	834,200,000	649,900,000
Goodwill, Impairment Loss		9,800,000	0	0
Interest expense		0	0	5,100,000
Other (income)		(18,400,000)	(13,100,000)	(14,900,000)
Income before income taxes	[1]	1,018,300,000	768,800,000	592,300,000
Financial Services [Member]
Gross profit:
Financial Services Revenue		265,000,000	166,400,000	173,400,000
General and administrative expense		172,400,000	131,200,000	116,400,000
Interest and other income		(12,500,000)	(10,200,000)	(8,500,000)
Income before income taxes	[1]	105,100,000	45,400,000	65,500,000
Available-for-sale Securities [Member]
Other comprehensive income (loss), net of income tax:
Unrealized gain (loss) related to available-for-sale securities		0	0	(200,000)
Debt Securities [Member]
Other comprehensive income (loss), net of income tax:
Unrealized gain (loss) related to available-for-sale securities		$ (800,000)	$ 300,000	$ 1,900,000

[1] Expenses maintained at the corporate level consist primarily of interest and property taxes, which are capitalized and amortized to cost of sales or expensed directly, and the expenses related to operating the Company’s corporate office. The amortization of capitalized interest and property taxes is allocated to each segment based on the segment’s cost of sales, while those expenses associated with the corporate office are allocated to each segment based on the segment’s inventory balances.