Commitments and Contingencies (Details Textuals) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Loss Contingency [Abstract]
Amount of self insurance	$ 17,500,000
Annual insurance limit minimum	250,000.00
Annual insurance limit maximum	1,000,000
Amount of Captive Insurance - Aggregate Limit	25,000,000
Amount of Captive Insurance - Individual Claim Limit	250,000
Reinsurance coverage acquired by captive insurance subsidiary	15,000,000
Captive Insurance - Aggregate amount beyond reinsurance coverage	10,000,000
Captive Insurance - Individual claim limit beyond reinsurance coverage	250,000
States with Third Party Reinsurance, Max Aggregate Retentions per Year	4,000,000
Maximum amount deductible under workers compensation insurance policy	500,000
Deductible policy amount per occurrence	500,000
Other Commitments [Abstract]
Outstanding letters of credit	95,800,000
Surety bonds	876,200,000
Rent expense	19,300,000	18,100,000	18,500,000
Letter of credit, other [Member]
Other Commitments [Abstract]
Outstanding letters of credit	3,100,000
Letter of credit, under revolving credit facility [Member]
Other Commitments [Abstract]
Outstanding letters of credit	92,700,000
Homebuilding [Member]
Loss Contingency [Abstract]
Liabilities for various claims, complaints and other legal actions	456,900,000	482,000,000	544,900,000
Construction defect portion of loss contingency accrual	99.00%	99.00%
Expenses related to legal claims	18,900,000	19,300,000	41,200,000
Estimated insurance recoveries related to legal claims	138,400,000	162,100,000
Land and Lot Option Purchase Contracts [Abstract]
Deposits	58,700,000
Purchase Obligation	2,000,000,000
Homebuilding [Member] | Cash Deposits [Member]
Land and Lot Option Purchase Contracts [Abstract]
Deposits	48,600,000
Homebuilding [Member] | Promissory Notes And Surety Bonds [Member]
Land and Lot Option Purchase Contracts [Abstract]
Deposits	10,100,000
Aggregate Limit [Member]
Loss Contingency [Abstract]
Self-insurance limits	15,000,000
Individual Claim Limit [Member]
Loss Contingency [Abstract]
Self-insurance limits	250,000.00
Option Contracts Subject to Specific Performance Clauses [Member] | Homebuilding [Member]
Land and Lot Option Purchase Contracts [Abstract]
Purchase Obligation	$ 30,900,000