Supplemental Guarantor Information - Consolidating Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	$ 163,025	$ (81,049)	$ (160,469)
Cash flows from investing activities:
Capital expenditures	(12,219)	(15,964)	(14,553)
Proceeds from sale of fixed assets	2,624	0	0
Investments in unconsolidated entities	(4,241)	(4,944)	(5,218)
Return of capital from unconsolidated entities and marketable securities	1,142	24,245	1,703
Increases in restricted cash	(5,852)	(5,546)	(15,608)
Decreases in restricted cash	30,348	29,586	1,645
Advances to/from subsidiaries	0	0	0
Net cash provided by (used in) investing activities	11,802	27,377	(32,031)
Cash flows from financing activities:
Repayment of debt	(828,221)	(18,573)	(307,602)
Proceeds from issuance of new debt	642,150	0	325,000
Repayment of borrowings from credit facility	(90,000)	(75,000)	0
Borrowings from credit facility	90,000	75,000	0
Debt issuance costs	(11,246)	(126)	(5,490)
Other changes	(222)	(200)	287
Dividends paid		0
Advances to/from subsidiaries	0	0	0
Net cash (used in) provided by financing activities	(197,539)	(18,899)	12,195
Decrease in cash and cash equivalents	(22,712)	(72,571)	(180,305)
Cash and cash equivalents at beginning of period	251,583	324,154	504,459
Cash and cash equivalents at end of period	228,871	251,583	324,154
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	0	0	0
Cash flows from investing activities:
Capital expenditures	0	0	0
Proceeds from sale of fixed assets	0
Investments in unconsolidated entities	0	0	0
Return of capital from unconsolidated entities and marketable securities	0	0	0
Increases in restricted cash	0	0	0
Decreases in restricted cash	0	0	0
Advances to/from subsidiaries	(203,701)	(302,594)	78,951
Net cash provided by (used in) investing activities	(203,701)	(302,594)	78,951
Cash flows from financing activities:
Repayment of debt	0	0	0
Proceeds from issuance of new debt	0		0
Repayment of borrowings from credit facility	0	0
Borrowings from credit facility	0	0
Debt issuance costs	0	0	0
Other changes	0	0	0
Dividends paid		0
Advances to/from subsidiaries	202,393	300,876	(77,582)
Net cash (used in) provided by financing activities	202,393	300,876	(77,582)
Decrease in cash and cash equivalents	(1,308)	(1,718)	1,369
Cash and cash equivalents at beginning of period	(3,192)	(1,474)	(2,843)
Cash and cash equivalents at end of period	(4,500)	(3,192)	(1,474)
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	(56,218)	(388,584)	(119,074)
Cash flows from investing activities:
Capital expenditures	0	0	0
Proceeds from sale of fixed assets	0
Investments in unconsolidated entities	0	0	0
Return of capital from unconsolidated entities and marketable securities	0	0	0
Increases in restricted cash	(2,388)	(2,982)	(14,111)
Decreases in restricted cash	26,698	27,751	39
Advances to/from subsidiaries	203,690	302,569	(78,951)
Net cash provided by (used in) investing activities	228,000	327,338	(93,023)
Cash flows from financing activities:
Repayment of debt	(819,044)	(8,703)	(305,061)
Proceeds from issuance of new debt	642,150		325,000
Repayment of borrowings from credit facility	(90,000)	(75,000)
Borrowings from credit facility	90,000	75,000
Debt issuance costs	(11,246)	(126)	(5,490)
Other changes	(222)	(200)	287
Dividends paid		500
Advances to/from subsidiaries	0	21	0
Net cash (used in) provided by financing activities	(188,362)	(8,508)	14,736
Decrease in cash and cash equivalents	(16,580)	(69,754)	(197,361)
Cash and cash equivalents at beginning of period	232,226	301,980	499,341
Cash and cash equivalents at end of period	215,646	232,226	301,980
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	219,401	307,668	(41,429)
Cash flows from investing activities:
Capital expenditures	(12,219)	(15,964)	(14,553)
Proceeds from sale of fixed assets	2,624
Investments in unconsolidated entities	(4,241)	(4,944)	(5,218)
Return of capital from unconsolidated entities and marketable securities	1,142	24,245	1,703
Increases in restricted cash	(3,464)	(2,564)	(1,497)
Decreases in restricted cash	3,650	1,835	1,606
Advances to/from subsidiaries	0	0	0
Net cash provided by (used in) investing activities	(12,508)	2,608	(17,959)
Cash flows from financing activities:
Repayment of debt	(9,177)	(9,870)	(2,541)
Proceeds from issuance of new debt	0		0
Repayment of borrowings from credit facility	0	0
Borrowings from credit facility	0	0
Debt issuance costs	0	0	0
Other changes	0	0	0
Dividends paid		0
Advances to/from subsidiaries	(202,393)	(300,897)	77,639
Net cash (used in) provided by financing activities	(211,570)	(310,767)	75,098
Decrease in cash and cash equivalents	(4,677)	(491)	15,710
Cash and cash equivalents at beginning of period	21,543	22,034	6,324
Cash and cash equivalents at end of period	16,866	21,543	22,034
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	(158)	(133)	34
Cash flows from investing activities:
Capital expenditures	0	0	0
Proceeds from sale of fixed assets	0
Investments in unconsolidated entities	0	0	0
Return of capital from unconsolidated entities and marketable securities	0	0	0
Increases in restricted cash	0	0	0
Decreases in restricted cash	0	0	0
Advances to/from subsidiaries	11	25	0
Net cash provided by (used in) investing activities	11	25	0
Cash flows from financing activities:
Repayment of debt	0	0	0
Proceeds from issuance of new debt	0		0
Repayment of borrowings from credit facility	0	0
Borrowings from credit facility	0	0
Debt issuance costs	0	0	0
Other changes	0	0	0
Dividends paid		(500)
Advances to/from subsidiaries	0	0	(57)
Net cash (used in) provided by financing activities	0	(500)	(57)
Decrease in cash and cash equivalents	(147)	(608)	(23)
Cash and cash equivalents at beginning of period	1,006	1,614	1,637
Cash and cash equivalents at end of period	$ 859	$ 1,006	$ 1,614

Decreases in restricted cash

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Increases in restricted cash

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Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.

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Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The increase (decrease) during the reporting period in the aggregate amount of obligations to be paid to the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management; an entity and its principal owners, management, or member of their immediate families; affiliates; or other parties with the ability to exert significant influence.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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Cash dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations that are returns of capital. Excludes dividends or distributions from equity method investments classified as operating activities.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Amount of cash inflow (outflow) from financing activities classified as other.

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The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

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