Supplemental Guarantor Information - Unaudited Condensed Consolidating Statements of Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	$ (39,908)	$ (30,869)
Cash flows from investing activities:
Capital expenditures	(8,661)	(9,718)
Proceeds from sale of fixed assets	126	2,549
Investments in unconsolidated entities	(3,005)	(3,138)
Return of capital from unconsolidated entities	1,621	1,142
Increases in restricted cash	(7,484)	(4,679)
Decreases in restricted cash	9,154	24,734
Advances to/from subsidiaries	0	0
Net cash (used in) provided by investing activities	(8,249)	10,890
Cash flows from financing activities:
Repayment of debt	(257,173)	(239,312)
Proceeds from issuance of new debt	250,000	137,900
Borrowings from credit facility	25,000	50,000
Repayment of borrowings from credit facility	25,000	50,000
Debt issuance costs	(4,757)	(2,545)
Advances to/from subsidiaries	0	0
Other financing activities	(403)	(438)
Net cash used in financing activities	(12,333)	(104,395)
Decrease in cash and cash equivalents	(60,490)	(124,374)
Cash and cash equivalents at beginning of period	228,871	251,583
Cash and cash equivalents at end of period	168,381	127,209
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	0	0
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from sale of fixed assets	0	0
Investments in unconsolidated entities	0	0
Return of capital from unconsolidated entities	0	0
Increases in restricted cash	0	0
Decreases in restricted cash	0	0
Advances to/from subsidiaries	(1,315)	(26,409)
Net cash (used in) provided by investing activities	(1,315)	(26,409)
Cash flows from financing activities:
Repayment of debt	0	0
Proceeds from issuance of new debt	0	0
Borrowings from credit facility	0	0
Repayment of borrowings from credit facility	0	0
Debt issuance costs	0	0
Advances to/from subsidiaries	(1,553)	24,308
Other financing activities	0	0
Net cash used in financing activities	(1,553)	24,308
Decrease in cash and cash equivalents	(2,868)	(2,101)
Cash and cash equivalents at beginning of period	(4,500)	(3,192)
Cash and cash equivalents at end of period	(7,368)	(5,293)
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	(40,966)	(50,272)
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from sale of fixed assets	0	0
Investments in unconsolidated entities	0	0
Return of capital from unconsolidated entities	0	0
Increases in restricted cash	(3,428)	(2,292)
Decreases in restricted cash	4,946	22,368
Advances to/from subsidiaries	1,293	26,409
Net cash (used in) provided by investing activities	2,811	46,485
Cash flows from financing activities:
Repayment of debt	(253,000)	(233,429)
Proceeds from issuance of new debt	250,000	137,900
Borrowings from credit facility	25,000	50,000
Repayment of borrowings from credit facility	25,000	50,000
Debt issuance costs	(4,757)	(2,545)
Advances to/from subsidiaries	0	0
Other financing activities	(403)	(438)
Net cash used in financing activities	(8,160)	(98,512)
Decrease in cash and cash equivalents	(46,315)	(102,299)
Cash and cash equivalents at beginning of period	215,646	232,226
Cash and cash equivalents at end of period	169,331	129,927
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	1,061	19,547
Cash flows from investing activities:
Capital expenditures	(8,661)	(9,718)
Proceeds from sale of fixed assets	126	2,549
Investments in unconsolidated entities	(3,005)	(3,138)
Return of capital from unconsolidated entities	1,621	1,142
Increases in restricted cash	(4,056)	(2,387)
Decreases in restricted cash	4,208	2,366
Advances to/from subsidiaries	0	0
Net cash (used in) provided by investing activities	(9,767)	(9,186)
Cash flows from financing activities:
Repayment of debt	(4,173)	(5,883)
Proceeds from issuance of new debt	0	0
Borrowings from credit facility	0	0
Repayment of borrowings from credit facility	0	0
Debt issuance costs	0	0
Advances to/from subsidiaries	1,553	(24,319)
Other financing activities	0	0
Net cash used in financing activities	(2,620)	(30,202)
Decrease in cash and cash equivalents	(11,326)	(19,841)
Cash and cash equivalents at beginning of period	16,866	21,543
Cash and cash equivalents at end of period	5,540	1,702
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash (used in) provided by operating activities	(3)	(144)
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from sale of fixed assets	0	0
Investments in unconsolidated entities	0	0
Return of capital from unconsolidated entities	0	0
Increases in restricted cash	0	0
Decreases in restricted cash	0	0
Advances to/from subsidiaries	22	0
Net cash (used in) provided by investing activities	22	0
Cash flows from financing activities:
Repayment of debt	0	0
Proceeds from issuance of new debt	0	0
Borrowings from credit facility	0	0
Repayment of borrowings from credit facility	0	0
Debt issuance costs	0	0
Advances to/from subsidiaries	0	11
Other financing activities	0	0
Net cash used in financing activities	0	11
Decrease in cash and cash equivalents	19	(133)
Cash and cash equivalents at beginning of period	859	1,006
Cash and cash equivalents at end of period	$ 878	$ 873