Supplemental Guarantor Information - Consolidating Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
ASSETS
Cash and cash equivalents	$ 292,147	$ 228,871	$ 251,583
Restricted cash	12,462	14,405	38,901
Accounts receivable (net of allowance of $330 and $354, respectively)	36,323	53,226
Income tax receivable	88	292
Owned inventory	1,542,807	1,569,279
Investments in unconsolidated entities	3,994	10,470
Deferred tax assets, net	307,896	309,955
Property and equipment, net	17,566	19,138
Investments in subsidiaries	0	0
Intercompany	0	0
Other assets	7,712	7,522
Total assets	2,220,995	2,213,158
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	103,484	104,174
Other liabilities	107,659	134,253
Intercompany	0	0
Total debt (net of premium/discount and debt issuance costs)	1,327,412	1,331,878
Total liabilities	1,538,555	1,570,305
Stockholders’ equity	682,440	642,853	$ 630,423	$ 279,118
Total liabilities and stockholders’ equity	2,220,995	2,213,158
Consolidating Adjustments
ASSETS
Cash and cash equivalents	(7,161)	(4,500)
Restricted cash	0	0
Accounts receivable (net of allowance of $330 and $354, 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
Investments in subsidiaries	(808,067)	(701,931)
Intercompany	(608,505)	(737,340)
Other assets	0	0
Total assets	(1,423,733)	(1,443,771)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	0	0
Intercompany	(615,666)	(741,840)
Total debt (net of premium/discount and debt issuance costs)	0	0
Total liabilities	(615,666)	(741,840)
Stockholders’ equity	(808,067)	(701,931)
Total liabilities and stockholders’ equity	(1,423,733)	(1,443,771)
Beazer Homes USA, Inc.
ASSETS
Cash and cash equivalents	283,191	215,646
Restricted cash	11,001	12,867
Accounts receivable (net of allowance of $330 and $354, respectively)	0	0
Income tax receivable	88	292
Owned inventory	0	0
Investments in unconsolidated entities	773	773
Deferred tax assets, net	307,896	309,955
Property and equipment, net	0	0
Investments in subsidiaries	808,067	701,931
Intercompany	606,168	734,766
Other assets	599	577
Total assets	2,017,783	1,976,807
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	11,229	11,315
Intercompany	2,337	2,574
Total debt (net of premium/discount and debt issuance costs)	1,321,777	1,320,065
Total liabilities	1,335,343	1,333,954
Stockholders’ equity	682,440	642,853
Total liabilities and stockholders’ equity	2,017,783	1,976,807
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	15,393	16,866
Restricted cash	1,461	1,538
Accounts receivable (net of allowance of $330 and $354, respectively)	36,322	53,225
Income tax receivable	0	0
Owned inventory	1,542,807	1,569,279
Investments in unconsolidated entities	3,221	9,697
Deferred tax assets, net	0	0
Property and equipment, net	17,566	19,138
Investments in subsidiaries	0	0
Intercompany	0	0
Other assets	7,098	6,930
Total assets	1,623,868	1,676,673
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	103,484	104,174
Other liabilities	96,189	122,561
Intercompany	613,329	739,266
Total debt (net of premium/discount and debt issuance costs)	5,635	11,813
Total liabilities	818,637	977,814
Stockholders’ equity	805,231	698,859
Total liabilities and stockholders’ equity	1,623,868	1,676,673
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	724	859
Restricted cash	0	0
Accounts receivable (net of allowance of $330 and $354, respectively)	1	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
Investments in subsidiaries	0	0
Intercompany	2,337	2,574
Other assets	15	15
Total assets	3,077	3,449
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	241	377
Intercompany	0	0
Total debt (net of premium/discount and debt issuance costs)	0	0
Total liabilities	241	377
Stockholders’ equity	2,836	3,072
Total liabilities and stockholders’ equity	$ 3,077	$ 3,449