Supplemental Guarantor Information - Unaudited Condensed Consolidating Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
ASSETS
Cash and cash equivalents	$ 41,277	$ 106,741	$ 84,399
Restricted cash	18,759	16,053	12,637
Accounts receivable (net of allowance of $313 and $304, respectively)	19,439	26,395
Income tax receivable	4,612	4,935
Owned inventory	1,574,280	1,504,248
Investments in unconsolidated entities	3,930	3,962
Deferred tax assets, net	247,382	246,957
Property and equipment, net	26,623	27,421
Operating lease right-of-use assets	12,975
Investments in subsidiaries	0	0
Intercompany	0	0
Goodwill	11,376	11,376
Other assets	7,451	9,556
Total assets	1,968,104	1,957,644
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	110,153	131,152
Operating lease liabilities	15,158
Other liabilities	95,451	109,429
Intercompany	0	0
Total debt, net	1,208,062	1,178,309
Total liabilities	1,428,824	1,418,890
Stockholders’ equity	539,280	538,754	$ 635,109	$ 644,027
Total liabilities and stockholders’ equity	1,968,104	1,957,644
Consolidating Adjustments
ASSETS
Cash and cash equivalents	0	0
Restricted cash	0	0
Accounts receivable (net of allowance of $313 and $304, respectively)	0	0
Income tax receivable	0	0
Owned inventory	0	0
Investments in unconsolidated entities	0	0
Deferred tax assets, net	0	0
Property and equipment, net	0	0
Operating lease right-of-use assets	0
Investments in subsidiaries	(711,246)	(636,791)
Intercompany	(749,922)	(755,449)
Goodwill	0	0
Other assets	0	0
Total assets	(1,461,168)	(1,392,240)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Operating lease liabilities	0
Other liabilities	0	0
Intercompany	(749,922)	(755,449)
Total debt, net	0	0
Total liabilities	(749,922)	(755,449)
Stockholders’ equity	(711,246)	(636,791)
Total liabilities and stockholders’ equity	(1,461,168)	(1,392,240)
Beazer Homes USA, Inc. | Reportable Legal Entities
ASSETS
Cash and cash equivalents	35,258	70,617
Restricted cash	17,847	14,847
Accounts receivable (net of allowance of $313 and $304, respectively)	0	0
Income tax receivable	4,612	4,935
Owned inventory	0	0
Investments in unconsolidated entities	773	773
Deferred tax assets, net	247,382	246,957
Property and equipment, net	0	0
Operating lease right-of-use assets	0
Investments in subsidiaries	711,246	636,791
Intercompany	748,246	753,769
Goodwill	0	0
Other assets	1,098	1,235
Total assets	1,766,462	1,729,924
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Operating lease liabilities	0
Other liabilities	17,444	12,335
Intercompany	1,676	1,680
Total debt, net	1,208,062	1,177,155
Total liabilities	1,227,182	1,191,170
Stockholders’ equity	539,280	538,754
Total liabilities and stockholders’ equity	1,766,462	1,729,924
Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Cash and cash equivalents	6,007	36,115
Restricted cash	912	1,206
Accounts receivable (net of allowance of $313 and $304, respectively)	19,439	26,394
Income tax receivable	0	0
Owned inventory	1,574,280	1,504,248
Investments in unconsolidated entities	3,157	3,189
Deferred tax assets, net	0	0
Property and equipment, net	26,623	27,421
Operating lease right-of-use assets	12,975
Investments in subsidiaries	0	0
Intercompany	0	0
Goodwill	11,376	11,376
Other assets	6,353	8,317
Total assets	1,661,122	1,618,266
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	110,153	131,152
Operating lease liabilities	15,158
Other liabilities	77,991	97,081
Intercompany	748,246	753,769
Total debt, net	0	1,154
Total liabilities	951,548	983,156
Stockholders’ equity	709,574	635,110
Total liabilities and stockholders’ equity	1,661,122	1,618,266
Non-Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Cash and cash equivalents	12	9
Restricted cash	0	0
Accounts receivable (net of allowance of $313 and $304, respectively)	0	1
Income tax receivable	0	0
Owned inventory	0	0
Investments in unconsolidated entities	0	0
Deferred tax assets, net	0	0
Property and equipment, net	0	0
Operating lease right-of-use assets	0
Investments in subsidiaries	0	0
Intercompany	1,676	1,680
Goodwill	0	0
Other assets	0	4
Total assets	1,688	1,694
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Operating lease liabilities	0
Other liabilities	16	13
Intercompany	0	0
Total debt, net	0	0
Total liabilities	16	13
Stockholders’ equity	1,672	1,681
Total liabilities and stockholders’ equity	$ 1,688	$ 1,694