Supplemental Guarantor Information - Unaudited Consolidating Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	$ (172,532)	$ (113,878)
Cash flows from investing activities:
Capital expenditures	(2,934)	(3,200)
Investments in unconsolidated entities	(1,144)	(2,164)
Increases in restricted cash	(1,445)bzh_IncreasesInRestrictedCash	(728)bzh_IncreasesInRestrictedCash
Decreases in restricted cash	294bzh_DecreasesInRestrictedCash	551bzh_DecreasesInRestrictedCash
Payments to Acquire Interest in Subsidiaries and Affiliates	0
Net cash used in investing activities	(5,229)	(5,541)
Cash flows from financing activities:
Repayment of debt	(7,388)us-gaap_RepaymentsOfDebt	(2,035)us-gaap_RepaymentsOfDebt
Debt issuance costs	(126)us-gaap_PaymentsOfDebtIssuanceCosts	(32)us-gaap_PaymentsOfDebtIssuanceCosts
Advances to/from subsidiaries	0	0
Payments for other financing activities	(199)	(413)
Net cash provided by financing activities	(7,713)	(2,480)
Decrease in cash and cash equivalents	(185,474)	(121,899)
Cash and cash equivalents at beginning of period	324,154	504,459
Cash and cash equivalents at end of period	138,680	382,560
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(30,841)	(37,161)
Cash flows from investing activities:
Capital expenditures	0	0
Investments in unconsolidated entities	0	0
Increases in restricted cash	(959)	(433)
Decreases in restricted cash	0	39
Payments to Acquire Interest in Subsidiaries and Affiliates	(114,977)
Net cash used in investing activities	(115,936)	(394)
Cash flows from financing activities:
Repayment of debt	(7,038)	(1,913)
Debt issuance costs	(126)	(32)
Advances to/from subsidiaries	0	(70,833)
Payments for other financing activities	(199)	(413)
Net cash provided by financing activities	(7,363)	(73,191)
Decrease in cash and cash equivalents	(154,140)	(110,746)
Cash and cash equivalents at beginning of period	301,980	499,341
Cash and cash equivalents at end of period	147,840	388,595
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(141,603)	(76,683)
Cash flows from investing activities:
Capital expenditures	(2,934)	(3,200)
Investments in unconsolidated entities	(1,144)	(2,164)
Increases in restricted cash	(486)	(295)
Decreases in restricted cash	294	512
Payments to Acquire Interest in Subsidiaries and Affiliates	0
Net cash used in investing activities	(4,270)	(5,147)
Cash flows from financing activities:
Repayment of debt	(350)	(122)
Debt issuance costs	0	0
Advances to/from subsidiaries	124,171	75,697
Payments for other financing activities	0	0
Net cash provided by financing activities	123,821	75,575
Decrease in cash and cash equivalents	(22,052)	(6,255)
Cash and cash equivalents at beginning of period	22,034	6,324
Cash and cash equivalents at end of period	(18)	69
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(88)	(34)
Cash flows from investing activities:
Capital expenditures	0	0
Investments in unconsolidated entities	0	0
Increases in restricted cash	0	0
Decreases in restricted cash	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	0
Net cash used in investing activities	0	0
Cash flows from financing activities:
Repayment of debt	0	0
Debt issuance costs	0	0
Advances to/from subsidiaries	4	(69)
Payments for other financing activities	0	0
Net cash provided by financing activities	4	(69)
Decrease in cash and cash equivalents	(84)	(103)
Cash and cash equivalents at beginning of period	1,614	1,637
Cash and cash equivalents at end of period	1,530	1,534
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	0	0
Cash flows from investing activities:
Capital expenditures	0	0
Investments in unconsolidated entities	0	0
Increases in restricted cash	0	0
Decreases in restricted cash	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	114,977
Net cash used in investing activities	114,977	0
Cash flows from financing activities:
Repayment of debt	0	0
Debt issuance costs	0	0
Advances to/from subsidiaries	(124,175)	(4,795)
Payments for other financing activities	0	0
Net cash provided by financing activities	(124,175)	(4,795)
Decrease in cash and cash equivalents	(9,198)	(4,795)
Cash and cash equivalents at beginning of period	(1,474)	(2,843)
Cash and cash equivalents at end of period	$ (10,672)	$ (7,638)

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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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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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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The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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