Contingencies - Litigation and Other Matters (Details) (USD $)	12 Months Ended							12 Months Ended
	Sep. 30, 2013 home	Sep. 30, 2012 home	Sep. 30, 2013 Damages from Product Defects [Member] home	Sep. 30, 2013 Performance Bonds	Sep. 30, 2013 Letter of Credit	Sep. 30, 2012 Letter of Credit	Sep. 30, 2013 DPA Liability [Member]	Sep. 30, 2006 First Order New Jersey Department of Environmental Protection - Violation of Permit	Sep. 30, 2006 Second Order New Jersey Department of Environmental Protection - Violation of Permit
Loss Contingencies [Line Items]
Company's Liability Under Deferred Prosecution Agreement, Percentage of Company's Adjusted EBITDA	4.00%
Loss Contingency, Range of Possible Loss, Maximum	$ 55,000,000
Loss Contingency, Damages Paid, Value	16,600,000
Minimum standard product warranty period	1 year
Maximum standard product warranty period	2 years
Number of homes that have not accepted Company's offer to repair	113	174	2
Accrued amounts for litigation and other contingent liabilities	19,900,000	19,400,000					3,600,000
Loss Contingency, Damages Sought, Value								630,000	678,000
Letters of credit secured using cash collateral					25,200,000	24,700,000
Cash collateral in restricted accounts securing letters of credit				$ 160,300,000