Supplemental Guarantor Information - Unaudited Condensed Consolidating Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018
ASSETS
Cash and cash equivalents	$ 294,265		$ 106,741	$ 86,441
Restricted cash	18,282		16,053	12,197
Accounts receivable (net of allowance of $309 and $304, respectively)	20,574		26,395
Income tax receivable	9,224		4,935
Owned inventory	1,595,300		1,504,248
Investments in unconsolidated entities	4,040		3,962
Deferred tax assets, net	238,766		246,957
Property and equipment, net	25,820		27,421
Operating lease right-of-use assets	15,109
Investments in subsidiaries	0		0
Intercompany	0		0
Goodwill	11,376		11,376
Other assets	6,239		9,556
Total assets	2,238,995		1,957,644
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	137,238		131,152
Operating lease liabilities	17,147
Other liabilities	108,336		109,429
Intercompany	0		0
Total debt, net	1,428,792		1,178,309
Total liabilities	1,691,513		1,418,890
Stockholders’ equity	547,482	$ 539,280	538,754	$ 529,158	$ 635,109	$ 644,027
Total liabilities and stockholders’ equity	2,238,995		1,957,644
Consolidating Adjustments
ASSETS
Cash and cash equivalents	0		0
Restricted cash	0		0
Accounts receivable (net of allowance of $309 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	(747,785)		(636,791)
Intercompany	(699,505)		(755,449)
Goodwill	0		0
Other assets	0		0
Total assets	(1,447,290)		(1,392,240)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0		0
Operating lease liabilities	0
Other liabilities	0		0
Intercompany	(699,505)		(755,449)
Total debt, net	0		0
Total liabilities	(699,505)		(755,449)
Stockholders’ equity	(747,785)		(636,791)
Total liabilities and stockholders’ equity	(1,447,290)		(1,392,240)
Beazer Homes USA, Inc. | Reportable Legal Entities
ASSETS
Cash and cash equivalents	291,549		70,617
Restricted cash	17,097		14,847
Accounts receivable (net of allowance of $309 and $304, respectively)	0		0
Income tax receivable	9,224		4,935
Owned inventory	0		0
Investments in unconsolidated entities	773		773
Deferred tax assets, net	238,766		246,957
Property and equipment, net	0		0
Operating lease right-of-use assets	0
Investments in subsidiaries	747,785		636,791
Intercompany	697,843		753,769
Goodwill	0		0
Other assets	973		1,235
Total assets	2,004,010		1,729,924
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0		0
Operating lease liabilities	0
Other liabilities	26,076		12,335
Intercompany	1,662		1,680
Total debt, net	1,428,790		1,177,155
Total liabilities	1,456,528		1,191,170
Stockholders’ equity	547,482		538,754
Total liabilities and stockholders’ equity	2,004,010		1,729,924
Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Cash and cash equivalents	2,715		36,115
Restricted cash	1,185		1,206
Accounts receivable (net of allowance of $309 and $304, respectively)	20,568		26,394
Income tax receivable	0		0
Owned inventory	1,595,300		1,504,248
Investments in unconsolidated entities	3,267		3,189
Deferred tax assets, net	0		0
Property and equipment, net	25,820		27,421
Operating lease right-of-use assets	15,109
Investments in subsidiaries	0		0
Intercompany	0		0
Goodwill	11,376		11,376
Other assets	5,263		8,317
Total assets	1,680,603		1,618,266
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	137,238		131,152
Operating lease liabilities	17,147
Other liabilities	82,251		97,081
Intercompany	697,843		753,769
Total debt, net	2		1,154
Total liabilities	934,481		983,156
Stockholders’ equity	746,122		635,110
Total liabilities and stockholders’ equity	1,680,603		1,618,266
Non-Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Cash and cash equivalents	1		9
Restricted cash	0		0
Accounts receivable (net of allowance of $309 and $304, respectively)	6		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	1,662		1,680
Goodwill	0		0
Other assets	3		4
Total assets	1,672		1,694
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0		0
Operating lease liabilities	0
Other liabilities	9		13
Intercompany	0		0
Total debt, net	0		0
Total liabilities	9		13
Stockholders’ equity	1,663		1,681
Total liabilities and stockholders’ equity	$ 1,672		$ 1,694