Supplemental Guarantor Information - Unaudited Consolidating Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Total revenue	$ 385,607	$ 299,359	$ 730,056	$ 565,123
Home construction and land sales expenses	324,216	245,446	609,727	475,992
Inventory impairments and abandonments	1,825	0	3,181	0
Gross profit	59,566	53,913	117,148	89,131
Commissions	14,582	11,969	28,356	22,895
General and administrative expenses	38,898	32,727	70,567	64,168
Depreciation and amortization	3,056	2,781	6,047	5,122
Operating income (loss)	3,030	6,436	12,178	(3,054)
Equity in income (loss) of unconsolidated entities	(51)	82	9	224
Loss on extinguishment of debt	(1,631)	0	(2,459)	0
Other (expense) income, net	(6,558)	(8,473)	(13,123)	(17,907)
(Loss) income before income taxes	(5,210)	(1,955)	(3,395)	(20,737)
(Benefit from) provision for income taxes	(3,898)	105	(3,282)	(591)
Equity in income of subsidiaries	0	0	0	0
Loss from continuing operations	(1,312)	(2,060)	(113)	(20,146)
Income (loss) from discontinued operations, net of tax	78	64	(122)	(4,190)
Equity in loss of subsidiaries from discontinued operations	0	0	0	0
Net income (loss)	(1,234)	(1,996)	(235)	(24,336)
Change in unrealized loss related to available-for-sale securities	0	1,070	0	1,276
Comprehensive income (loss)	(1,234)	(926)	(235)	(23,060)
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Total revenue	0	0	0	0
Home construction and land sales expenses	16,073	9,782	29,440	17,976
Inventory impairments and abandonments	84		84
Gross profit	(16,157)	(9,782)	(29,524)	(17,976)
Commissions	0	0	0	0
General and administrative expenses	0	0	0	0
Depreciation and amortization	0	0	0	0
Operating income (loss)	(16,157)	(9,782)	(29,524)	(17,976)
Equity in income (loss) of unconsolidated entities	0	0	0	0
Loss on extinguishment of debt	(1,631)		(2,459)	0
Other (expense) income, net	(6,633)	(7,695)	(14,065)	(17,442)
(Loss) income before income taxes	(24,421)	(17,477)	(46,048)	(35,418)
(Benefit from) provision for income taxes	(11,917)	(6,456)	(22,060)	(13,083)
Equity in income of subsidiaries	11,192	8,961	23,875	2,189
Loss from continuing operations	(1,312)	(2,060)	(113)	(20,146)
Income (loss) from discontinued operations, net of tax	0	0	0	0
Equity in loss of subsidiaries from discontinued operations	78	64	(122)	(4,190)
Net income (loss)	(1,234)	(1,996)	(235)	(24,336)
Change in unrealized loss related to available-for-sale securities		1,070		1,276
Comprehensive income (loss)		(926)		(23,060)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenue	385,607	299,359	730,056	565,123
Home construction and land sales expenses	308,171	235,697	580,388	458,147
Inventory impairments and abandonments	1,741		3,097
Gross profit	75,695	63,662	146,571	106,976
Commissions	14,582	11,969	28,356	22,895
General and administrative expenses	38,867	32,694	70,509	64,108
Depreciation and amortization	3,056	2,781	6,047	5,122
Operating income (loss)	19,190	16,218	41,659	14,851
Equity in income (loss) of unconsolidated entities	(51)	82	9	224
Loss on extinguishment of debt	0		0	0
Other (expense) income, net	76	(777)	944	(463)
(Loss) income before income taxes	19,215	15,523	42,612	14,612
(Benefit from) provision for income taxes	8,020	6,561	18,762	12,467
Equity in income of subsidiaries	0	0	0	0
Loss from continuing operations	11,195	8,962	23,850	2,145
Income (loss) from discontinued operations, net of tax	81	68	(116)	(4,183)
Equity in loss of subsidiaries from discontinued operations	0	0	0	0
Net income (loss)	11,276	9,030	23,734	(2,038)
Change in unrealized loss related to available-for-sale securities		0		0
Comprehensive income (loss)		9,030		(2,038)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenue	28	33	101	131
Home construction and land sales expenses	0	0	0	0
Inventory impairments and abandonments	0		0
Gross profit	28	33	101	131
Commissions	0	0	0	0
General and administrative expenses	31	33	58	60
Depreciation and amortization	0	0	0	0
Operating income (loss)	(3)	0	43	71
Equity in income (loss) of unconsolidated entities	0	0	0	0
Loss on extinguishment of debt	0		0	0
Other (expense) income, net	(1)	(1)	(2)	(2)
(Loss) income before income taxes	(4)	(1)	41	69
(Benefit from) provision for income taxes	(1)	0	16	25
Equity in income of subsidiaries	0	0	0	0
Loss from continuing operations	(3)	(1)	25	44
Income (loss) from discontinued operations, net of tax	(3)	(4)	(6)	(7)
Equity in loss of subsidiaries from discontinued operations	0	0	0	0
Net income (loss)	(6)	(5)	19	37
Change in unrealized loss related to available-for-sale securities		0		0
Comprehensive income (loss)		(5)		37
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Total revenue	(28)	(33)	(101)	(131)
Home construction and land sales expenses	(28)	(33)	(101)	(131)
Inventory impairments and abandonments	0		0
Gross profit	0	0	0	0
Commissions	$ 0	0	0	0
General and administrative expenses		0	0	0
Depreciation and amortization	$ 0	0	0	0
Operating income (loss)	0	0	0	0
Equity in income (loss) of unconsolidated entities	0	0	0	0
Loss on extinguishment of debt	0		0	0
Other (expense) income, net	0	0	0	0
(Loss) income before income taxes	0	0	0	0
(Benefit from) provision for income taxes	0	0	0	0
Equity in income of subsidiaries	(11,192)	(8,961)	(23,875)	(2,189)
Loss from continuing operations	(11,192)	(8,961)	(23,875)	(2,189)
Income (loss) from discontinued operations, net of tax	0	0	0	0
Equity in loss of subsidiaries from discontinued operations	(78)	(64)	122	4,190
Net income (loss)	$ (11,270)	(9,025)	$ (23,753)	2,001
Change in unrealized loss related to available-for-sale securities		0		0
Comprehensive income (loss)		$ (9,025)		$ 2,001