Supplemental Guarantor Information - Unaudited Consolidating Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Total revenue	$ 344,449	$ 265,764
Home construction and land sales expenses	285,511	230,546
Inventory impairments and abandonments	1,356	0
Gross profit	57,582	35,218
Commissions	13,774	10,926
General and administrative expenses	31,669	31,441
Depreciation and amortization	2,991	2,341
Operating income (loss)	9,148	(9,490)
Equity in income of unconsolidated entities	60	142
Loss on extinguishment of debt	(828)	0
Other (expense) income, net	(6,565)	(9,434)
(Loss) income before income taxes	1,815	(18,782)
(Benefit from) provision for income taxes	616	(696)
Equity in income of subsidiaries	0	0
Income (loss) from continuing operations	1,199	(18,086)
Loss from discontinued operations, net of tax	(200)	(4,254)
Equity in loss of subsidiaries from discontinued operations	0	0
Net income (loss)	999	(22,340)
Change in unrealized loss related to available-for-sale securities	0	206
Comprehensive income (loss)	999	(22,134)
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Total revenue	0	0
Home construction and land sales expenses	13,367	8,194
Inventory impairments and abandonments	0
Gross profit	(13,367)	(8,194)
Commissions	0	0
General and administrative expenses	0	0
Depreciation and amortization	0	0
Operating income (loss)	(13,367)	(8,194)
Equity in income of unconsolidated entities	0	0
Loss on extinguishment of debt	(828)
Other (expense) income, net	(7,432)	(9,747)
(Loss) income before income taxes	(21,627)	(17,941)
(Benefit from) provision for income taxes	(10,143)	(6,627)
Equity in income of subsidiaries	12,683	(6,772)
Income (loss) from continuing operations	1,199	(18,086)
Loss from discontinued operations, net of tax	0	0
Equity in loss of subsidiaries from discontinued operations	(200)	(4,254)
Net income (loss)	999	(22,340)
Change in unrealized loss related to available-for-sale securities		206
Comprehensive income (loss)	999	(22,134)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenue	344,449	265,764
Home construction and land sales expenses	272,217	222,450
Inventory impairments and abandonments	1,356
Gross profit	70,876	43,314
Commissions	13,774	10,926
General and administrative expenses	31,642	31,414
Depreciation and amortization	2,991	2,341
Operating income (loss)	22,469	(1,367)
Equity in income of unconsolidated entities	60	142
Loss on extinguishment of debt	0
Other (expense) income, net	868	314
(Loss) income before income taxes	23,397	(911)
(Benefit from) provision for income taxes	10,742	5,906
Equity in income of subsidiaries	0	0
Income (loss) from continuing operations	12,655	(6,817)
Loss from discontinued operations, net of tax	(197)	(4,251)
Equity in loss of subsidiaries from discontinued operations	0	0
Net income (loss)	12,458	(11,068)
Change in unrealized loss related to available-for-sale securities		0
Comprehensive income (loss)	12,458	(11,068)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenue	73	98
Home construction and land sales expenses	0	0
Inventory impairments and abandonments	0
Gross profit	73	98
Commissions	0	0
General and administrative expenses	27	27
Depreciation and amortization	0	0
Operating income (loss)	46	71
Equity in income of unconsolidated entities	0	0
Loss on extinguishment of debt	0
Other (expense) income, net	(1)	(1)
(Loss) income before income taxes	45	70
(Benefit from) provision for income taxes	17	25
Equity in income of subsidiaries	0	0
Income (loss) from continuing operations	28	45
Loss from discontinued operations, net of tax	(3)	(3)
Equity in loss of subsidiaries from discontinued operations	0	0
Net income (loss)	25	42
Change in unrealized loss related to available-for-sale securities		0
Comprehensive income (loss)	25	42
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Total revenue	(73)	(98)
Home construction and land sales expenses	(73)	(98)
Inventory impairments and abandonments	0
Gross profit	0	0
Commissions	$ 0	0
General and administrative expenses		0
Depreciation and amortization	$ 0	0
Operating income (loss)	0	0
Equity in income of unconsolidated entities	0	0
Loss on extinguishment of debt	0
Other (expense) income, net	0	0
(Loss) income before income taxes	0	0
(Benefit from) provision for income taxes	0	0
Equity in income of subsidiaries	(12,683)	6,772
Income (loss) from continuing operations	(12,683)	6,772
Loss from discontinued operations, net of tax	0	0
Equity in loss of subsidiaries from discontinued operations	200	4,254
Net income (loss)	(12,483)	11,026
Change in unrealized loss related to available-for-sale securities		0
Comprehensive income (loss)	$ (12,483)	$ 11,026