Supplemental Guarantor Information - Unaudited Condensed Consolidating Statements of Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	$ (62,834)	$ (77,849)
Cash flows from investing activities:
Capital expenditures	(2,874)	(2,663)
Proceeds from sale of fixed assets	46	2,437
Investments in unconsolidated entities	(1,397)	(1,779)
Return of capital from unconsolidated entities	1,621	1,142
Increases in restricted cash	(3,646)	(1,119)
Decreases in restricted cash	2,088	669
Advances to/from subsidiaries	0	0
Net cash used in investing activities	(4,162)	(1,313)
Cash flows from financing activities:
Repayment of debt	(2,525)	(26,926)
Debt issuance costs	(340)	(413)
Advances to/from subsidiaries	0	0
Other financing activities	(387)	(201)
Net cash used in financing activities	(3,252)	(27,540)
Decrease in cash and cash equivalents	(70,248)	(106,702)
Cash and cash equivalents at beginning of period	228,871	251,583
Cash and cash equivalents at end of period	158,623	144,881
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
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	50,314	33,119
Net cash used in investing activities	50,314	33,119
Cash flows from financing activities:
Repayment of debt	0	0
Debt issuance costs	0	0
Advances to/from subsidiaries	(52,222)	(38,311)
Other financing activities	0	0
Net cash used in financing activities	(52,222)	(38,311)
Decrease in cash and cash equivalents	(1,908)	(5,192)
Cash and cash equivalents at beginning of period	(4,500)	(3,192)
Cash and cash equivalents at end of period	(6,408)	(8,384)
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(2,902)	(22,794)
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	(1,817)	0
Decreases in restricted cash	0	0
Advances to/from subsidiaries	(50,314)	(33,119)
Net cash used in investing activities	(52,131)	(33,119)
Cash flows from financing activities:
Repayment of debt	0	(22,875)
Debt issuance costs	(340)	(413)
Advances to/from subsidiaries	0	0
Other financing activities	(387)	(201)
Net cash used in financing activities	(727)	(23,489)
Decrease in cash and cash equivalents	(55,760)	(79,402)
Cash and cash equivalents at beginning of period	215,646	232,226
Cash and cash equivalents at end of period	159,886	152,824
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(59,928)	(55,038)
Cash flows from investing activities:
Capital expenditures	(2,874)	(2,663)
Proceeds from sale of fixed assets	46	2,437
Investments in unconsolidated entities	(1,397)	(1,779)
Return of capital from unconsolidated entities	1,621	1,142
Increases in restricted cash	(1,829)	(1,119)
Decreases in restricted cash	2,088	669
Advances to/from subsidiaries	0	0
Net cash used in investing activities	(2,345)	(1,313)
Cash flows from financing activities:
Repayment of debt	(2,525)	(4,051)
Debt issuance costs	0	0
Advances to/from subsidiaries	52,224	38,312
Other financing activities	0	0
Net cash used in financing activities	49,699	34,261
Decrease in cash and cash equivalents	(12,574)	(22,090)
Cash and cash equivalents at beginning of period	16,866	21,543
Cash and cash equivalents at end of period	4,292	(547)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(4)	(17)
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	0	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	(2)	(1)
Other financing activities	0	0
Net cash used in financing activities	(2)	(1)
Decrease in cash and cash equivalents	(6)	(18)
Cash and cash equivalents at beginning of period	859	1,006
Cash and cash equivalents at end of period	$ 853	$ 988