Borrowings - Narrative (Details) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended	3 Months Ended														1 Months Ended	3 Months Ended											6 Months Ended	12 Months Ended								6 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013	Mar. 31, 2014 Tangible Equity Units	Mar. 31, 2013 Senior Notes [Member]	Mar. 31, 2014 Senior Notes [Member]	Sep. 30, 2013 Senior Notes [Member]	Apr. 03, 2014 Senior Notes [Member] 5 3/4% Senior Notes Maturing June 2019 [Domain]	Mar. 31, 2014 Senior Notes [Member] 7 1/2% Senior Notes Maturing September 2021 [Member]	Sep. 30, 2013 Senior Notes [Member] 7 1/2% Senior Notes Maturing September 2021 [Member]	Mar. 31, 2014 Senior Notes [Member] 7 1/4% Senior Notes Maturing February 2023 [Member]	Sep. 30, 2013 Senior Notes [Member] 7 1/4% Senior Notes Maturing February 2023 [Member]	Feb. 01, 2013 Senior Notes [Member] 7 1/4% Senior Notes Maturing February 2023 [Member]	Mar. 31, 2014 Senior Notes [Member] 6.625% Senior Secured Notes	Sep. 30, 2013 Senior Notes [Member] 6.625% Senior Secured Notes	Mar. 31, 2014 Senior Notes [Member] 9 1/8% Senior Notes Maturing May 2019	Sep. 30, 2013 Senior Notes [Member] 9 1/8% Senior Notes Maturing May 2019	Mar. 31, 2014 Senior Notes [Member] 6 7/8% Senior Notes Maturing July 2015	Apr. 30, 2014 Senior Notes [Member] 9 1/8% Senior Notes Maturing June 2018	Jun. 30, 2014 Senior Notes [Member] 9 1/8% Senior Notes Maturing June 2018	Mar. 31, 2014 Senior Notes [Member] 9 1/8% Senior Notes Maturing June 2018	Sep. 30, 2013 Senior Notes [Member] 9 1/8% Senior Notes Maturing June 2018	Mar. 31, 2014 Senior Notes [Member] 8 1/8% Senior Notes Maturing June 2016	Sep. 30, 2013 Senior Notes [Member] 8 1/8% Senior Notes Maturing June 2016	Mar. 31, 2014 Senior Notes [Member] Tangible Equity Units	Jul. 17, 2012 Senior Notes [Member] Tangible Equity Units TEUs	Mar. 31, 2014 Junior Subordinated Notes	Sep. 30, 2013 Junior Subordinated Notes	Jan. 15, 2010 Junior Subordinated Notes	Jun. 15, 2006 Junior Subordinated Notes	Mar. 31, 2014 Cash Secured Loan	Sep. 30, 2013 Cash Secured Loan	Mar. 31, 2014 Other Secured Notes Payable	Sep. 30, 2013 Other Secured Notes Payable	Mar. 31, 2014 Secured Revolving Credit Facility	Sep. 30, 2013 Secured Revolving Credit Facility	Dec. 31, 2012 Secured Revolving Credit Facility	Mar. 31, 2014 Letter of Credit	Sep. 30, 2013 Letter of Credit	Mar. 31, 2014 Common Stock	Mar. 31, 2014 Optional Redemption Under Indenture [Member] Senior Notes [Member] 6 7/8% Senior Notes Maturing July 2015	Mar. 31, 2014 Debt Instrument, Convertible, Stock Price Trigger, Range Two [Member] Tangible Equity Units
Line of Credit Facility [Abstract]
Credit facility borrowing capacity																																						$ 150,000,000	$ 22,000,000	$ 220,000,000
Amount of available borrowings under the Secured Revolving Credit Facility																																					150,000,000
Inventory assets pledged as collateral																																					1,000,000,000
Outstanding borrowings under the Secured Revolving Credit Facility																																					0	0
Letters of credit secured using cash collateral																																								26,500,000	25,200,000
Senior Notes [Abstract]
Beazer homes' ownership interest in guarantor subsidiaries (less than 10% in Inspirada Builders LLC)	100.00%		100.00%
Minimum consolidated tangible net worth	85,000,000		85,000,000
Amount of original debt that could be repurchased								27,500,000
Consolidated tangible net worth	206,800,000		206,800,000												200,000,000
Aggregate principal amount of debt										325,000,000		200,000,000																			75,000,000	103,100,000
Debt Instrument, Interest Rate, Stated Percentage										5.75%	7.50%	7.50%	7.25%	7.25%	7.25%	6.625%	6.625%	9.125%	9.125%	6.875%			9.125%	9.125%	8.125%	8.125%		7.50%	7.987%
Early Repayment of Senior Debt																					17,200,000
Tangible Equity Units TEUs Converted during period units						890,000																																						1,252,675
Stock Exchange, Debt Related to Tangible Equity Unit																											2,400,000
Loss on extinguishment of debt	(153,000)	(3,638,000)	(153,000)	(3,638,000)			(3,600,000)															(19,800,000)												1,000,000
Outstanding debt instrument principal amount redeemed																								2,000,000										205,000,000
Stock Issued During Period, Shares, Conversion of Units																																										1,368,108
Debt Issuance Discount												98.541%
Tangible Capital [Abstract]
Tangible Equity Units (TEUs) issued during period, (units)																												4,600,000
Junior Subordinated Notes [Abstract]
Effective period of debt instrument interest rate																													10 years
Debt instrument redemption price (percent)																																											101.146%
Unamortized accretion	4,780,000		4,780,000		5,160,000			4,780,000	5,160,000																				46,100,000
Secured Debt [Abstract]
Three-month LIBOR																																	LIBOR
Long-term debt	$ 1,511,873,000		$ 1,511,873,000		$ 1,512,183,000			$ 1,411,007,000	$ 1,416,860,000																				$ 54,703,000	$ 53,670,000			$ 22,368,000	$ 22,368,000	$ 23,795,000	$ 19,285,000
Weighted average fixed interest rate of debt (percent)																																			4.03%
Debt Instrument, Basis Spread on Variable Rate																																	0.40%