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Line of Credit Facility, Number of Lenders

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount, after accumulated amortization, of debt discount.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Weighted average interest rate of debt outstanding.

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The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

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Gross amount of debt extinguished.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The carrying amount, as of the date of the latest financial statement presented, of real estate owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

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Borrowings - Narrative (Details)	1 Months Ended			3 Months Ended								12 Months Ended
Borrowings - Narrative (Details)	Oct. 31, 2017 USD ($)	Sep. 30, 2016 USD ($)	Mar. 31, 2016	Sep. 30, 2017 USD ($) lender	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2017 USD ($) lender	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Jan. 15, 2010 USD ($)	Jun. 15, 2006
Senior Notes [Abstract]
Beazer homes' ownership interest in guarantor subsidiaries				100.00%								100.00%
Total debt (net of premium/discount and debt issuance costs)		$ 1,331,878,000		$ 1,327,412,000				$ 1,331,878,000				$ 1,327,412,000	$ 1,331,878,000
Loss on extinguishment of debt				$ (2,933,000)	$ 0	$ 15,563,000	$ 0	$ 11,393,000	$ (429,000)	$ 1,631,000	$ 828,000	$ 12,630,000	$ 13,423,000	$ 80,000
6 3/4% Senior Notes Maturing March of 2025
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)				6.75%								6.75%
8 3/4% Senior Notes Maturing March 2022
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)		8.75%		8.75%				8.75%				8.75%	8.75%
5 3/4% Senior Notes Maturing June 2019
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)		5.75%		5.75%				5.75%				5.75%	5.75%
7 1/2% Senior Notes Maturing September 2021
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)		7.50%		7.50%				7.50%				7.50%	7.50%
7 1/4% Senior Notes Maturing February 2023
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)		7.25%		7.25%				7.25%				7.25%	7.25%
Senior Notes
Senior Notes [Abstract]
Total debt (net of premium/discount and debt issuance costs)		$ 1,207,526,000		$ 1,259,840,000				$ 1,207,526,000				$ 1,259,840,000	$ 1,207,526,000
Senior Notes \| Subsequent Event
Senior Notes [Abstract]
Redemption of senior notes	$ 34,500,000
Loss on extinguishment of debt	$ 25,900,000
Senior Notes \| 5.875% unsecured Senior Notes \| Subsequent Event
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)	5.875%
Junior Subordinated Notes [Abstract]
Aggregate principal amount of debt	$ 400,000,000
Senior Notes \| 6 3/4% Senior Notes Maturing March of 2025
Senior Notes [Abstract]
Notes payable						$ 250,000,000
Debt instrument stated interest rate (percent)						6.75%
Total debt (net of premium/discount and debt issuance costs)		0		250,000,000				0				250,000,000	0
Percent of original debt amount required to be offered for repurchase (percent)						35.00%
Debt instrument redemption price (percent)						101.00%
Senior Notes \| 6 3/4% Senior Notes Maturing March of 2025 \| Optional Redemption Under Indenture
Senior Notes [Abstract]
Percent of original debt amount required to be offered for repurchase (percent)						65.00%
Debt instrument redemption price (percent)						106.75%
Senior Notes \| 8 3/4% Senior Notes Maturing March 2022, First Issuance
Senior Notes [Abstract]
Notes payable				400,000,000								400,000,000
Senior Notes \| 8 3/4% Senior Notes Maturing March 2022, Additional Issuance
Senior Notes [Abstract]
Notes payable				$ 100,000,000								$ 100,000,000
Senior Notes \| 8 3/4% Senior Notes Maturing March 2022
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)				8.75%								8.75%
Amortization of debt discount (premium)		104.25
Total debt (net of premium/discount and debt issuance costs)		$ 500,000,000		$ 500,000,000				$ 500,000,000				$ 500,000,000	$ 500,000,000
Percent of original debt amount required to be offered for repurchase (percent)				35.00%								35.00%
Debt instrument redemption price (percent)		101.00%						101.00%					101.00%
Senior Notes \| 8 3/4% Senior Notes Maturing March 2022 \| Optional Redemption Under Indenture
Senior Notes [Abstract]
Percent of original debt amount required to be offered for repurchase (percent)				65.00%								65.00%
Debt instrument redemption price (percent)				108.75%								108.75%
Senior Notes \| 5 3/4% Senior Notes Maturing June 2019
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)				5.75%								5.75%
Total debt (net of premium/discount and debt issuance costs)		$ 321,393,000		$ 321,393,000				$ 321,393,000				$ 321,393,000	$ 321,393,000
Redemption of senior notes												$ 3,600,000
Senior Notes \| 7 1/2% Senior Notes Maturing September 2021
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)				7.50%								7.50%
Total debt (net of premium/discount and debt issuance costs)		198,000,000		$ 0				198,000,000				$ 0	198,000,000
Redemption of senior notes												$ 2,000,000
Senior Notes \| 5.25% unsecured Senior Notes due 2019
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)				5.75%								5.75%
Senior Notes \| 5.25% unsecured Senior Notes due 2019 \| Subsequent Event
Senior Notes [Abstract]
Extinguishment of debt, amount	$ 225,000,000
Debt instrument stated interest rate (percent)	5.75%
Senior Notes \| 7 1/4% Senior Notes Maturing February 2023
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)				7.25%								7.25%
Total debt (net of premium/discount and debt issuance costs)		199,834,000		$ 199,834,000				199,834,000				$ 199,834,000	199,834,000
Senior Notes \| 7 1/4% Senior Notes Maturing February 2023 \| Subsequent Event
Senior Notes [Abstract]
Extinguishment of debt, amount	$ 175,000,000
Debt instrument stated interest rate (percent)	7.25%
Term Loan
Senior Notes [Abstract]
Total debt (net of premium/discount and debt issuance costs)		52,669,000		0				52,669,000				0	52,669,000
Term Loan [Abstract]
Debt instrument term			2 years
Junior Subordinated Notes [Abstract]
Aggregate principal amount of debt					$ 140,000,000
Debt Instrument, Unamortized Discount		880,000		0				880,000				0	880,000
Junior Subordinated Notes
Senior Notes [Abstract]
Debt instrument stated interest rate (percent)																7.987%
Total debt (net of premium/discount and debt issuance costs)		59,870,000		61,937,000				59,870,000				$ 61,937,000	59,870,000
Junior Subordinated Notes [Abstract]
Aggregate principal amount of debt															$ 75,000,000
Effective period of debt instrument interest rate												10 years
Debt Instrument, Unamortized Discount		40,903,000		$ 38,837,000				40,903,000				$ 38,837,000	40,903,000
Secured Debt [Abstract]
Weighted average fixed interest rate of debt (percent)				4.12%								4.12%
Other Secured Notes Payable
Senior Notes [Abstract]
Total debt (net of premium/discount and debt issuance costs)		11,813,000		$ 5,635,000				11,813,000				$ 5,635,000	11,813,000
Secured Debt [Abstract]
Weighted average fixed interest rate of debt (percent)				1.41%								1.41%
Secured Revolving Credit Facility
Line of Credit Facility [Abstract]
Maximum borrowing capacity		145,000,000		$ 180,000,000				145,000,000				$ 180,000,000	145,000,000
Number of lenders \| lender				3								3
Outstanding borrowings under Secured Revolving Credit Facility		0		$ 0				0				$ 0	0
Inventory assets pledged as collateral		1,000,000,000		800,000,000			$ 800,000,000	1,000,000,000				800,000,000	1,000,000,000
Secured Revolving Credit Facility \| Subsequent Event
Line of Credit Facility [Abstract]
Maximum borrowing capacity	$ 200,000,000
Letter of Credit
Line of Credit Facility [Abstract]
Letters of credit secured using cash collateral		$ 12,100,000		$ 10,800,000				$ 12,100,000				$ 10,800,000	$ 12,100,000
Maximum \| Secured Revolving Credit Facility
Line of Credit Facility [Abstract]
Aggregate Collateral Ratio		5.00					4.00	5.00					5.00
Minimum \| Secured Revolving Credit Facility
Line of Credit Facility [Abstract]
Aggregate Collateral Ratio		1.00					1.00	1.00					1.00