Supplemental Guarantor Information - Unaudited Consolidating Statements of Income (Loss) and Unaudited Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Total revenue	$ 372,489	$ 339,241
Home construction and land sales expenses	311,660	285,578
Gross profit	60,829	53,663
Commissions	14,356	13,323
General and administrative expenses	37,285	36,388
Depreciation and amortization	2,507	2,677
Operating income	6,681	1,275
Equity in (loss) income of unconsolidated entities	(101)	22
Gain on extinguishment of debt	(25,904)	0
Other (expense) income, net	(3,145)	(5,196)
(Loss) income before income taxes	(22,469)	(3,899)
(Benefit) expense from income taxes	108,106	(2,540)
Equity in income of subsidiaries	0	0
Loss from continuing operations	(130,575)	(1,359)
Loss from discontinued operations, net of tax	(372)	(70)
Equity in loss of subsidiaries from discontinued operations	0	0
Net loss and comprehensive loss	(130,947)	(1,429)
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Total revenue	(14)	(36)
Home construction and land sales expenses	(14)	(36)
Gross profit	0	0
Commissions	0	0
General and administrative expenses	0	0
Depreciation and amortization	0	0
Operating income	0	0
Equity in (loss) income of unconsolidated entities	0	0
Gain on extinguishment of debt	0
Other (expense) income, net	0	0
(Loss) income before income taxes	0	0
(Benefit) expense from income taxes	0	0
Equity in income of subsidiaries	96,953	(11,968)
Loss from continuing operations	96,953	(11,968)
Loss from discontinued operations, net of tax	0	0
Equity in loss of subsidiaries from discontinued operations	372	70
Net loss and comprehensive loss	97,325	(11,898)
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Total revenue	0	0
Home construction and land sales expenses	16,468	15,644
Gross profit	(16,468)	(15,644)
Commissions	0	0
General and administrative expenses	0	0
Depreciation and amortization	0	0
Operating income	(16,468)	(15,644)
Equity in (loss) income of unconsolidated entities	0	0
Gain on extinguishment of debt	(25,904)
Other (expense) income, net	(3,435)	(5,252)
(Loss) income before income taxes	(45,807)	(20,896)
(Benefit) expense from income taxes	(12,185)	(7,569)
Equity in income of subsidiaries	(96,953)	11,968
Loss from continuing operations	(130,575)	(1,359)
Loss from discontinued operations, net of tax	0	(70)
Equity in loss of subsidiaries from discontinued operations	(372)	0
Net loss and comprehensive loss	(130,947)	(1,429)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenue	372,489	339,241
Home construction and land sales expenses	295,206	269,970
Gross profit	77,283	69,271
Commissions	14,356	13,323
General and administrative expenses	37,244	36,365
Depreciation and amortization	2,507	2,677
Operating income	23,176	16,906
Equity in (loss) income of unconsolidated entities	(101)	22
Gain on extinguishment of debt	0
Other (expense) income, net	296	57
(Loss) income before income taxes	23,371	16,985
(Benefit) expense from income taxes	120,303	5,025
Equity in income of subsidiaries	0	0
Loss from continuing operations	(96,932)	11,960
Loss from discontinued operations, net of tax	(369)	0
Equity in loss of subsidiaries from discontinued operations	0	(67)
Net loss and comprehensive loss	(97,301)	11,893
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenue	14	36
Home construction and land sales expenses	0	0
Gross profit	14	36
Commissions	0	0
General and administrative expenses	41	23
Depreciation and amortization	0	0
Operating income	(27)	13
Equity in (loss) income of unconsolidated entities	0	0
Gain on extinguishment of debt	0
Other (expense) income, net	(6)	(1)
(Loss) income before income taxes	(33)	12
(Benefit) expense from income taxes	(12)	4
Equity in income of subsidiaries	0	0
Loss from continuing operations	(21)	8
Loss from discontinued operations, net of tax	(3)	0
Equity in loss of subsidiaries from discontinued operations	0	(3)
Net loss and comprehensive loss	$ (24)	$ 5