Supplemental Guarantor Information - Consolidating Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
ASSETS
Cash and cash equivalents	$ 139,805	$ 292,147	$ 228,871
Restricted cash	13,443	12,462	14,405
Accounts receivable (net of allowance of $378 and $330, respectively)	24,647	36,323
Income tax receivable	0	88
Owned inventory	1,692,284	1,542,807
Investments in unconsolidated entities	4,035	3,994
Deferred tax assets, net	213,955	307,896
Property and equipment, net	20,843	17,566
Investments in subsidiaries	0	0
Intercompany	0	0
Goodwill and intangible assets, net	9,751	0
Other assets	9,339	7,712
Total assets	2,128,102	2,220,995
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	126,432	103,484
Other liabilities	126,389	107,659
Intercompany	0	0
Total debt (net of premium/discount and debt issuance costs)	1,231,254	1,327,412
Total liabilities	1,484,075	1,538,555
Stockholders’ equity	644,027	682,440	$ 642,853	$ 630,423
Total liabilities and stockholders’ equity	2,128,102	2,220,995
Consolidating Adjustments
ASSETS
Cash and cash equivalents	0	(7,161)
Restricted cash	0	0
Accounts receivable (net of allowance of $378 and $330, 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	(645,086)	(808,067)
Intercompany	(924,829)	(608,505)
Goodwill and intangible assets, net	0
Other assets	0	0
Total assets	(1,569,915)	(1,423,733)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	0	0
Intercompany	(924,829)	(615,666)
Total debt (net of premium/discount and debt issuance costs)	0	0
Total liabilities	(924,829)	(615,666)
Stockholders’ equity	(645,086)	(808,067)
Total liabilities and stockholders’ equity	(1,569,915)	(1,423,733)
Beazer Homes USA, Inc.
ASSETS
Cash and cash equivalents	93,875	283,191
Restricted cash	10,921	11,001
Accounts receivable (net of allowance of $378 and $330, respectively)	0	0
Income tax receivable	0	88
Owned inventory	0	0
Investments in unconsolidated entities	773	773
Deferred tax assets, net	213,955	307,896
Property and equipment, net	0	0
Investments in subsidiaries	645,086	808,067
Intercompany	922,525	606,168
Goodwill and intangible assets, net	0
Other assets	694	599
Total assets	1,887,829	2,017,783
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	14,357	11,229
Intercompany	2,304	2,337
Total debt (net of premium/discount and debt issuance costs)	1,227,141	1,321,777
Total liabilities	1,243,802	1,335,343
Stockholders’ equity	644,027	682,440
Total liabilities and stockholders’ equity	1,887,829	2,017,783
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	45,355	15,393
Restricted cash	2,522	1,461
Accounts receivable (net of allowance of $378 and $330, respectively)	24,647	36,322
Income tax receivable	0	0
Owned inventory	1,692,284	1,542,807
Investments in unconsolidated entities	3,262	3,221
Deferred tax assets, net	0	0
Property and equipment, net	20,843	17,566
Investments in subsidiaries	0	0
Intercompany	0	0
Goodwill and intangible assets, net	9,751
Other assets	8,626	7,098
Total assets	1,807,290	1,623,868
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	126,432	103,484
Other liabilities	111,906	96,189
Intercompany	922,525	613,329
Total debt (net of premium/discount and debt issuance costs)	4,113	5,635
Total liabilities	1,164,976	818,637
Stockholders’ equity	642,314	805,231
Total liabilities and stockholders’ equity	1,807,290	1,623,868
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	575	724
Restricted cash	0	0
Accounts receivable (net of allowance of $378 and $330, 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
Investments in subsidiaries	0	0
Intercompany	2,304	2,337
Goodwill and intangible assets, net	0
Other assets	19	15
Total assets	2,898	3,077
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	126	241
Intercompany	0	0
Total debt (net of premium/discount and debt issuance costs)	0	0
Total liabilities	126	241
Stockholders’ equity	2,772	2,836
Total liabilities and stockholders’ equity	$ 2,898	$ 3,077