Supplemental Guarantor Information - Unaudited Condensed Consolidating Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Condensed Financial Statements, Captions [Line Items]
Allowance for Doubtful Accounts Receivable	$ 378	$ 378
ASSETS
Cash and cash equivalents	84,399	139,805	$ 177,812
Restricted cash	12,637	13,443	$ 12,082
Accounts receivable (net of allowance of $378 and $378, respectively)	19,349	24,647
Owned inventory	1,722,120	1,692,284
Investments in unconsolidated entities	3,650	4,035
Deferred tax assets, net	218,025	213,955
Property and equipment, net	24,408	20,843
Investments in subsidiaries	0	0
Intercompany	0	0
Goodwill	10,605	9,751
Other assets	8,197	9,339
Total assets	2,103,390	2,128,102
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	99,864	126,432
Other liabilities	112,633	126,389
Intercompany	0	0
Total debt, net	1,255,784	1,231,254
Total liabilities	1,468,281	1,484,075
Stockholders’ equity	635,109	644,027
Total liabilities and stockholders’ equity	2,103,390	2,128,102
Consolidating Adjustments
ASSETS
Cash and cash equivalents	0	0
Restricted cash	0	0
Accounts receivable (net of allowance of $378 and $378, respectively)	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	(636,800)	(645,086)
Intercompany	(958,442)	(924,829)
Goodwill	0	0
Other assets	0	0
Total assets	(1,595,242)	(1,569,915)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	0	0
Intercompany	(958,442)	(924,829)
Total debt, net	0	0
Total liabilities	(958,442)	(924,829)
Stockholders’ equity	(636,800)	(645,086)
Total liabilities and stockholders’ equity	(1,595,242)	(1,569,915)
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Allowance for Doubtful Accounts Receivable	378			$ 378
ASSETS
Cash and cash equivalents	82,115	93,875
Restricted cash	11,897	10,921
Accounts receivable (net of allowance of $378 and $378, respectively)	0	0
Owned inventory	0	0
Investments in unconsolidated entities	773	773
Deferred tax assets, net	218,025	213,955
Property and equipment, net	0	0
Investments in subsidiaries	636,800	645,086
Intercompany	963,614	922,525
Goodwill	0	0
Other assets	982	694
Total assets	1,914,206	1,887,829
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	24,261	14,357
Intercompany	1,686	2,304
Total debt, net	1,253,150	1,227,141
Total liabilities	1,279,097	1,243,802
Stockholders’ equity	635,109	644,027
Total liabilities and stockholders’ equity	1,914,206	1,887,829
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	2,267	45,355
Restricted cash	740	2,522
Accounts receivable (net of allowance of $378 and $378, respectively)	19,349	24,647
Owned inventory	1,722,120	1,692,284
Investments in unconsolidated entities	2,877	3,262
Deferred tax assets, net	0	0
Property and equipment, net	24,408	20,843
Investments in subsidiaries	0	0
Intercompany	(6,858)	0
Goodwill	10,605	9,751
Other assets	7,215	8,626
Total assets	1,782,723	1,807,290
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	99,864	126,432
Other liabilities	88,359	111,906
Intercompany	956,756	922,525
Total debt, net	2,634	4,113
Total liabilities	1,147,613	1,164,976
Stockholders’ equity	635,110	642,314
Total liabilities and stockholders’ equity	1,782,723	1,807,290
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	17	575
Restricted cash	0	0
Accounts receivable (net of allowance of $378 and $378, respectively)	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	1,686	2,304
Goodwill	0	0
Other assets	0	19
Total assets	1,703	2,898
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	13	126
Intercompany	0	0
Total debt, net	0	0
Total liabilities	13	126
Stockholders’ equity	1,690	2,772
Total liabilities and stockholders’ equity	$ 1,703	$ 2,898