Supplemental Guarantor Information - Consolidating Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Total revenue	$ 632,852	$ 429,438	$ 299,359	$ 265,764	$ 545,905	$ 354,671	$ 270,021	$ 293,170	$ 1,627,413	$ 1,463,767	$ 1,287,577
Home construction and land sales expenses									1,351,860	1,192,001	1,070,814
Inventory impairments and option contract abandonments	2,860	249	0	0	5,386	2,010	880	31	3,109	8,307	2,633
Gross profit	107,205	76,108	53,913	35,218	87,813	68,804	52,172	54,670	272,444	263,459	214,130
Commissions									65,023	58,028	52,922
General and administrative expenses									142,496	136,463	121,163
Depreciation and amortization									13,338	13,279	12,784
Operating income	36,945	17,696	6,436	(9,490)	23,452	15,088	5,617	11,532	51,587	55,689	27,261
Equity in income (loss) of unconsolidated entities									536	6,545	(113)
Loss on extinguishment of debt	(80)	0	0	0	0	(19,764)	(153)	0	(80)	(19,917)	(4,636)
Other expense, net									(30,013)	(49,191)	(58,165)
Income (loss) from continuing operations before income taxes									22,030	(6,874)	(35,653)
Benefit from income taxes									(324,569)	(41,797)	(3,489)
Equity in income of subsidiaries									0	0	0
Income (loss) from continuing operations	$ 354,524	$ 12,221	$ (2,060)	$ (18,086)	$ 60,288	$ (13,193)	$ (8,224)	$ (3,948)	346,599	34,923	(32,164)
Loss from discontinued operations, net of tax									(2,505)	(540)	(1,704)
Equity in loss of subsidiaries									0	0	0
Net income (loss)									344,094	34,383	(33,868)
Change in unrealized loss related to available-for-sale securities									1,276	(1,276)	0
Comprehensive income (loss)									345,370	33,107	(33,868)
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Total revenue									0	0	0
Home construction and land sales expenses									55,006	39,255	41,246
Inventory impairments and option contract abandonments									0	245	0
Gross profit									(55,006)	(39,500)	(41,246)
Commissions									0	0	0
General and administrative expenses									0	0	0
Depreciation and amortization									0	0	0
Operating income									(55,006)	(39,500)	(41,246)
Equity in income (loss) of unconsolidated entities									0	0	0
Loss on extinguishment of debt									(80)	(19,917)	(4,636)
Other expense, net									(29,752)	(50,786)	(59,458)
Income (loss) from continuing operations before income taxes									(84,838)	(110,203)	(105,340)
Benefit from income taxes									(32,275)	(14,247)	(10,765)
Equity in income of subsidiaries									399,162	130,879	62,411
Income (loss) from continuing operations									346,599	34,923	(32,164)
Loss from discontinued operations, net of tax									0	0	0
Equity in loss of subsidiaries									(2,505)	(540)	(1,704)
Net income (loss)									344,094	34,383	(33,868)
Change in unrealized loss related to available-for-sale securities									1,276	(1,276)
Comprehensive income (loss)									345,370	33,107
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenue									1,627,413	1,463,767	1,287,577
Home construction and land sales expenses									1,297,052	1,153,125	1,030,304
Inventory impairments and option contract abandonments									3,109	8,062	2,633
Gross profit									327,252	302,580	254,640
Commissions									65,023	58,028	52,922
General and administrative expenses									142,391	136,349	121,035
Depreciation and amortization									13,338	13,279	12,784
Operating income									106,500	94,924	67,899
Equity in income (loss) of unconsolidated entities									536	6,545	(113)
Loss on extinguishment of debt									0	0	0
Other expense, net									(258)	1,600	1,278
Income (loss) from continuing operations before income taxes									106,778	103,069	69,064
Benefit from income taxes									(292,326)	(27,642)	7,058
Equity in income of subsidiaries									0	0	0
Income (loss) from continuing operations									399,104	130,711	62,006
Loss from discontinued operations, net of tax									(2,495)	(532)	(1,736)
Equity in loss of subsidiaries									0	0	0
Net income (loss)									396,609	130,179	60,270
Change in unrealized loss related to available-for-sale securities									0	0
Comprehensive income (loss)									396,609	130,179
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenue									198	379	736
Home construction and land sales expenses									0	0	0
Inventory impairments and option contract abandonments									0	0	0
Gross profit									198	379	736
Commissions									0	0	0
General and administrative expenses									105	114	128
Depreciation and amortization									0	0	0
Operating income									93	265	608
Equity in income (loss) of unconsolidated entities									0	0	0
Loss on extinguishment of debt									0	0	0
Other expense, net									(3)	(5)	15
Income (loss) from continuing operations before income taxes									90	260	623
Benefit from income taxes									32	92	218
Equity in income of subsidiaries									0	0	0
Income (loss) from continuing operations									58	168	405
Loss from discontinued operations, net of tax									(10)	(8)	32
Equity in loss of subsidiaries									0	0	0
Net income (loss)									48	160	437
Change in unrealized loss related to available-for-sale securities									0	0
Comprehensive income (loss)									48	160
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Total revenue									(198)	(379)	(736)
Home construction and land sales expenses									(198)	(379)	(736)
Inventory impairments and option contract abandonments									0	0	0
Gross profit									0	0	0
Commissions									0	0	0
General and administrative expenses									0	0	0
Depreciation and amortization									0	0	0
Operating income									0	0	0
Equity in income (loss) of unconsolidated entities									0	0	0
Loss on extinguishment of debt									0	0	0
Other expense, net									0	0	0
Income (loss) from continuing operations before income taxes									0	0	0
Benefit from income taxes									0	0	0
Equity in income of subsidiaries									(399,162)	(130,879)	(62,411)
Income (loss) from continuing operations									(399,162)	(130,879)	(62,411)
Loss from discontinued operations, net of tax									0	0	0
Equity in loss of subsidiaries									2,505	540	1,704
Net income (loss)									(396,657)	(130,339)	$ (60,707)
Change in unrealized loss related to available-for-sale securities									0	0
Comprehensive income (loss)									$ (396,657)	$ (130,339)