Notes Payable (Details Textuals 1) (USD $)	3 Months Ended	12 Months Ended			0 Months Ended							12 Months Ended								3 Months Ended		1 Months Ended			12 Months Ended											12 Months Ended
	Jun. 30, 2014	Sep. 30, 2014		Sep. 30, 2014 Letter of credit, under revolving credit facility [Member]	Aug. 01, 2014 Homebuilding [Member]	Sep. 30, 2014 Homebuilding [Member]	Jul. 24, 2013 Homebuilding [Member]	Sep. 30, 2014 Homebuilding [Member] Revolving credit facility, maturing 2018 [Member]		Jun. 30, 2014 Homebuilding [Member] Revolving credit facility, maturing 2018 [Member]	Sep. 30, 2013 Homebuilding [Member] Revolving credit facility, maturing 2018 [Member]	Sep. 30, 2014 SeniorNoteTwentyEight [Member] Homebuilding [Member] Unsecured Debt [Member]		Sep. 30, 2014 Senior Note Member Twenty Five [Member] Homebuilding [Member] Unsecured Debt [Member]		Sep. 30, 2014 Senior Note Twenty Seven [Member] Homebuilding [Member] Unsecured Debt [Member]		Sep. 30, 2014 Senior Note Seven [Member] Homebuilding [Member] Unsecured Debt [Member]		Sep. 30, 2014 Senior Note Six [Member] Homebuilding [Member] Unsecured Debt [Member]	Sep. 30, 2014 Convertible Senior Note One [Member] Homebuilding [Member] Unsecured Debt [Member]	Jan. 31, 2014 Senior Note Five [Member] Homebuilding [Member] Unsecured Debt [Member]	Sep. 30, 2014 Senior Note Five [Member] Homebuilding [Member] Unsecured Debt [Member]	Sep. 30, 2013 Senior Note Four [Member] Homebuilding [Member] Unsecured Debt [Member]	Sep. 30, 2014 Senior Note Eight [Member] Homebuilding [Member] Unsecured Debt [Member]		Sep. 30, 2014 Senior Note Nine [Member] Homebuilding [Member] Unsecured Debt [Member]		Sep. 30, 2014 Senior Note Twenty Four [Member] Homebuilding [Member] Unsecured Debt [Member]		Sep. 30, 2014 Senior Note Twenty Six [Member] Homebuilding [Member] Unsecured Debt [Member]		Sep. 30, 2014 Senior Note Twenty Nine [Member] Homebuilding [Member] Unsecured Debt [Member]		Feb. 01, 2014 Senior Note Twenty Nine [Member] Homebuilding [Member] Unsecured Debt [Member]	Sep. 30, 2014 Senior Notes Redeemable Prior to Maturity [Member] Homebuilding [Member] Unsecured Debt [Member]	Sep. 30, 2014 Senior Notes Subject to Repurchase Upon Change of Control and Ratings Downgrade [Member] Homebuilding [Member] Unsecured Debt [Member]
Maturities of Long-term Debt [Abstract]
Maturities of notes payable in fiscal 2015		$ 522,400,000
Maturities of notes payable in fiscal 2016		543,500,000
Maturities of notes payable in fiscal 2017		350,600,000
Maturities of notes payable in fiscal 2018		400,600,000
Maturities of notes payable in fiscal 2019		800,600,000
Maturities of notes payable after fiscal 2019		1,065,500,000
Debt Instrument [Line Items]
Line of credit, current borrowing capacity								975,000,000		725,000,000
Line of credit, maximum borrowing capacity							1,300,000,000
Line of credit, amount outstanding								300,000,000	[1]		0
Line of Credit Facility, Interest Rate at Period End		2.90%	[2]
Letters of credit, amount outstanding		95,800,000		92,700,000
Senior notes, date issued												Aug. 01, 2013		Sep. 01, 2012		Feb. 01, 2013		Feb. 01, 2005							Dec. 01, 2004		Apr. 01, 2006		May 01, 2012		Feb. 01, 2013		Feb. 01, 2014
Senior notes, principal amount issued																																			500,000,000
Senior notes, stated interest rate												5.75%		4.375%		4.75%		5.25%		5.625%	2.00%		6.125%	6.875%	5.625%		6.50%		4.75%		3.625%		3.75%
Senior notes, date due												Aug. 15, 2023		Sep. 15, 2022		Feb. 15, 2023		Feb. 15, 2015							Jan. 15, 2016		Apr. 15, 2016		May 15, 2017		Feb. 15, 2018		Mar. 01, 2019
Debt Instrument, Call Feature												Yes	[3]	Yes	[3]	Yes	[3]	Yes	[3]						Yes	[3]	Yes	[3]	Yes	[3]	Yes	[3]	Yes	[3]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	38,600,000
Debt Instrument, Interest Rate, Effective Percentage												5.90%	[2]	4.50%	[2]	4.90%	[2]	5.40%	[2]						5.80%	[2]	6.60%	[2]	5.00%	[2]	3.80%	[2]	3.90%	[2]
Principal amount												400,000,000		350,000,000		300,000,000		157,700,000							170,200,000		372,700,000		350,000,000		400,000,000		500,000,000				2,300,000,000
Debt Instrument, Redemption Price, Percentage																																				100.00%	101.00%
Authorized repurchase of debt securities					500,000,000
Debt repurchase program, remaining authorized repurchase amount						500,000,000
Maturities of Senior Debt																				$ 137,900,000		$ 145,900,000
Debt Conversion, Converted Instrument, Shares Issued	77.18004	38,589,451

[1] The fair value approximates carrying value due to its short-term nature, short maturity or floating interest rate terms, as applicable.

[2] Interest is payable semi-annually on each of the series of senior notes. The annual effective interest rate is calculated after giving effect to the amortization of the financing costs and any discount associated with the note issuance.

[3] The Company may redeem the notes in whole at any time or in part from time to time, at a redemption price equal to the greater of 100% of their principal amount or the present value of the remaining scheduled payments on the redemption date, plus accrued interest.