Supplemental Guarantor Information - Condensed Consolidating Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
ASSETS
Cash and cash equivalents	$ 106,741	$ 139,805	$ 292,147
Restricted cash	16,053	13,443	12,462
Accounts receivable (net of allowance of $304 and $378)	26,395	24,647
Income tax receivable	4,935	0
Owned inventory	1,504,248	1,692,284
Investments in unconsolidated entities	3,962	4,035
Deferred tax assets, net	246,957	213,955
Property and equipment, net	27,421	20,843
Investments in subsidiaries	0	0
Intercompany	0	0
Goodwill	11,376	9,751
Other assets	9,556	9,339
Total assets	1,957,644	2,128,102
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	131,152	126,432
Other liabilities	109,429	126,389
Intercompany	0	0
Total debt (net of premium and debt issuance costs)	1,178,309	1,231,254
Total liabilities	1,418,890	1,484,075
Stockholders’ equity	538,754	644,027	$ 682,440	$ 642,853
Total liabilities and stockholders’ equity	1,957,644	2,128,102
Consolidating Adjustments
ASSETS
Cash and cash equivalents	0	0
Restricted cash	0	0
Accounts receivable (net of allowance of $304 and $378)	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
Investments in subsidiaries	(636,791)	(645,086)
Intercompany	(755,449)	(924,829)
Goodwill	0	0
Other assets	0	0
Total assets	(1,392,240)	(1,569,915)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	0	0
Intercompany	(755,449)	(924,829)
Total debt (net of premium and debt issuance costs)	0	0
Total liabilities	(755,449)	(924,829)
Stockholders’ equity	(636,791)	(645,086)
Total liabilities and stockholders’ equity	(1,392,240)	(1,569,915)
Beazer Homes USA, Inc.
ASSETS
Cash and cash equivalents	70,617	93,875
Restricted cash	14,847	10,921
Accounts receivable (net of allowance of $304 and $378)	0	0
Income tax receivable	4,935	0
Owned inventory	0	0
Investments in unconsolidated entities	773	773
Deferred tax assets, net	246,957	213,955
Property and equipment, net	0	0
Investments in subsidiaries	636,791	645,086
Intercompany	753,769	922,525
Goodwill	0	0
Other assets	1,235	694
Total assets	1,729,924	1,887,829
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	12,335	14,357
Intercompany	1,680	2,304
Total debt (net of premium and debt issuance costs)	1,177,155	1,227,141
Total liabilities	1,191,170	1,243,802
Stockholders’ equity	538,754	644,027
Total liabilities and stockholders’ equity	1,729,924	1,887,829
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	36,115	45,355
Restricted cash	1,206	2,522
Accounts receivable (net of allowance of $304 and $378)	26,394	24,647
Income tax receivable	0	0
Owned inventory	1,504,248	1,692,284
Investments in unconsolidated entities	3,189	3,262
Deferred tax assets, net	0	0
Property and equipment, net	27,421	20,843
Investments in subsidiaries	0	0
Intercompany	0	0
Goodwill	11,376	9,751
Other assets	8,317	8,626
Total assets	1,618,266	1,807,290
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	131,152	126,432
Other liabilities	97,081	111,906
Intercompany	753,769	922,525
Total debt (net of premium and debt issuance costs)	1,154	4,113
Total liabilities	983,156	1,164,976
Stockholders’ equity	635,110	642,314
Total liabilities and stockholders’ equity	1,618,266	1,807,290
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	9	575
Restricted cash	0	0
Accounts receivable (net of allowance of $304 and $378)	1	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
Investments in subsidiaries	0	0
Intercompany	1,680	2,304
Goodwill	0	0
Other assets	4	19
Total assets	1,694	2,898
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	13	126
Intercompany	0	0
Total debt (net of premium and debt issuance costs)	0	0
Total liabilities	13	126
Stockholders’ equity	1,681	2,772
Total liabilities and stockholders’ equity	$ 1,694	$ 2,898