Supplemental Guarantor Information - Unaudited Condensed Consolidating Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015
ASSETS
Cash and cash equivalents	$ 138,809	$ 228,871	$ 134,933	$ 251,583
Restricted cash	14,696	14,405
Accounts receivable (net of allowance of $193 and $354, respectively)	43,781	53,226
Income tax receivable	288	292
Owned inventory	1,631,072	1,569,279
Investments in unconsolidated entities	6,112	10,470
Deferred tax assets, net	317,296	309,955
Property and equipment, net	18,981	19,138
Investments in subsidiaries	0	0
Intercompany	0	0
Other assets	4,166	7,522
Total assets	2,175,201	2,213,158
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	100,290	104,174
Other liabilities	102,527	134,253
Intercompany	0	0
Total debt (net of premium of $3,799 and $1,482, respectively, and debt issuance costs of $15,709 and $15,514, respectively)	1,334,362	1,331,878
Total liabilities	1,537,179	1,570,305
Stockholders’ equity	638,022	642,853
Total liabilities and stockholders’ equity	2,175,201	2,213,158
Consolidating Adjustments
ASSETS
Cash and cash equivalents	(5,238)	(4,500)	(6,770)	(3,192)
Restricted cash	0	0
Accounts receivable (net of allowance of $193 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	(731,043)	(701,931)
Intercompany	(768,511)	(737,340)
Other assets	0	0
Total assets	(1,504,792)	(1,443,771)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	0	0
Intercompany	(773,749)	(741,840)
Total debt (net of premium of $3,799 and $1,482, respectively, and debt issuance costs of $15,709 and $15,514, respectively)	0	0
Total liabilities	(773,749)	(741,840)
Stockholders’ equity	(731,043)	(701,931)
Total liabilities and stockholders’ equity	(1,504,792)	(1,443,771)
Beazer Homes USA, Inc.
ASSETS
Cash and cash equivalents	142,287	215,646	135,124	232,226
Restricted cash	13,344	12,867
Accounts receivable (net of allowance of $193 and $354, respectively)	0	0
Income tax receivable	288	292
Owned inventory	0	0
Investments in unconsolidated entities	773	773
Deferred tax assets, net	317,296	309,955
Property and equipment, net	0	0
Investments in subsidiaries	731,043	701,931
Intercompany	766,146	734,766
Other assets	769	577
Total assets	1,971,946	1,976,807
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	12,107	11,315
Intercompany	2,365	2,574
Total debt (net of premium of $3,799 and $1,482, respectively, and debt issuance costs of $15,709 and $15,514, respectively)	1,319,452	1,320,065
Total liabilities	1,333,924	1,333,954
Stockholders’ equity	638,022	642,853
Total liabilities and stockholders’ equity	1,971,946	1,976,807
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	956	16,866	5,639	21,543
Restricted cash	1,352	1,538
Accounts receivable (net of allowance of $193 and $354, respectively)	43,778	53,225
Income tax receivable	0	0
Owned inventory	1,631,072	1,569,279
Investments in unconsolidated entities	5,339	9,697
Deferred tax assets, net	0	0
Property and equipment, net	18,981	19,138
Investments in subsidiaries	0	0
Intercompany	0	0
Other assets	3,383	6,930
Total assets	1,704,861	1,676,673
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	100,290	104,174
Other liabilities	90,096	122,561
Intercompany	771,384	739,266
Total debt (net of premium of $3,799 and $1,482, respectively, and debt issuance costs of $15,709 and $15,514, respectively)	14,910	11,813
Total liabilities	976,680	977,814
Stockholders’ equity	728,181	698,859
Total liabilities and stockholders’ equity	1,704,861	1,676,673
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	804	859	$ 940	$ 1,006
Restricted cash	0	0
Accounts receivable (net of allowance of $193 and $354, respectively)	3	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	2,365	2,574
Other assets	14	15
Total assets	3,186	3,449
LIABILITIES AND STOCKHOLDERS’ EQUITY
Trade accounts payable	0	0
Other liabilities	324	377
Intercompany	0	0
Total debt (net of premium of $3,799 and $1,482, respectively, and debt issuance costs of $15,709 and $15,514, respectively)	0	0
Total liabilities	324	377
Stockholders’ equity	2,862	3,072
Total liabilities and stockholders’ equity	$ 3,186	$ 3,449