Borrowings - Narrative (Details) (USD $) Share data in Millions, unless otherwise specified									1 Months Ended	3 Months Ended	12 Months Ended						3 Months Ended					3 Months Ended	9 Months Ended		3 Months Ended					3 Months Ended													3 Months Ended						1 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Mar. 31, 2012 Tangible Equity Units TEUs	Dec. 31, 2012 Senior Notes	Sep. 30, 2012 Senior Notes	Dec. 31, 2012 Senior Notes 6.625% Senior Secured Notes	Sep. 30, 2012 Senior Notes 6.625% Senior Secured Notes	Jul. 31, 2012 Senior Notes 6.625% Senior Secured Notes	Jul. 31, 2012 Senior Notes 12% Senior Secured Notes Maturing October 2017	Sep. 30, 2012 Senior Notes 12% Senior Secured Notes Maturing October 2017	Sep. 30, 2012 Senior Notes 9 1/8% Senior Notes Maturing May 2019	Dec. 31, 2012 Senior Notes 9 1/8% Senior Notes Maturing May 2019	Dec. 31, 2012 Senior Notes 6 7/8% Senior Notes Maturing July 2015	Sep. 30, 2012 Senior Notes 6 7/8% Senior Notes Maturing July 2015	Dec. 31, 2012 Senior Notes 8 1/8% Senior Notes Maturing June 2016	Sep. 30, 2012 Senior Notes 8 1/8% Senior Notes Maturing June 2016	Mar. 31, 2012 Senior Notes Tangible Equity Units TEUs	Jul. 17, 2012 Senior Notes Tangible Equity Units TEUs	May 31, 2010 Senior Notes Tangible Equity Units TEUs	Dec. 31, 2012 Convertible Subordinated Debt	Sep. 30, 2012 Convertible Subordinated Debt	Mar. 31, 2012 Convertible Subordinated Debt 7 1/2% Mandatory Convertible Subordinated Notes [Member]	Jun. 30, 2013 Convertible Subordinated Debt 7 1/2% Mandatory Convertible Subordinated Notes [Member]	Jan. 12, 2010 Convertible Subordinated Debt 7 1/2% Mandatory Convertible Subordinated Notes [Member]	Dec. 31, 2012 Junior Subordinated Notes	Sep. 30, 2012 Junior Subordinated Notes	Jun. 01, 2012 Junior Subordinated Notes	Jan. 15, 2010 Junior Subordinated Notes	Jun. 15, 2006 Junior Subordinated Notes	Dec. 31, 2011 Cash Secured Loan	Dec. 31, 2012 Cash Secured Loan	Sep. 30, 2012 Cash Secured Loan	Nov. 30, 2010 Cash Secured Loan	Dec. 31, 2012 Other Secured Notes Payable	Sep. 30, 2012 Other Secured Notes Payable	Dec. 31, 2012 Secured Revolving Credit Facility	Sep. 30, 2012 Secured Revolving Credit Facility	Jun. 30, 2012 Secured Revolving Credit Facility	Dec. 31, 2012 Letter of Credit	Sep. 30, 2012 Letter of Credit	Dec. 31, 2012 Minimum Senior Notes 6.625% Senior Secured Notes	Dec. 31, 2012 Maximum Senior Notes 6.625% Senior Secured Notes	Dec. 31, 2012 Common Stock	Mar. 31, 2012 Common Stock	Dec. 31, 2012 In Compliance [Member] Senior Notes 6.625% Senior Secured Notes	Dec. 31, 2012 Optional Redemption Under Indenture [Member] Senior Notes 6.625% Senior Secured Notes	Dec. 31, 2012 Not In Compliance [Member] Senior Notes 6.625% Senior Secured Notes	Jan. 15, 2013 Subsequent Event Convertible Subordinated Debt 7 1/2% Mandatory Convertible Subordinated Notes [Member]	Jan. 25, 2013 Subsequent Event Common Stock
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																																							23,000,000	24,700,000
Senior Notes [Abstract]
Beazer homes' ownership interest in guarantor subsidiaries (less than 10% in Inspirada Builders LLC)	100.00%
Percent of original debt amount required to be offered for repurchase (percent)				10.00%		35.00%																																								65.00%
Minimum consolidated tangible net worth	85,000,000
Amount of original debt that could be repurchased				62,500,000
Consolidated tangible net worth	216,700,000
Aggregate principal amount of debt								300,000,000																57,500,000				75,000,000	103,100,000
Debt instrument stated interest rate (percent)						6.625%	6.625%	6.625%	12.00%		9.125%	9.125%	6.875%	6.875%	8.125%	8.125%		7.50%	7.25%						7.987%
Repayments of Long-term Debt									280,000,000
Loss on extinguishment of debt										(42,400,000)	(30,000)						700,000
Outstanding senior secured debt instrument principal amount redeemed											15,000,000																					20,000,000
Aggregate purchase price of Senior Notes											14,600,000
Shares exchanged for common stock																																												2.8
Tangible Capital [Abstract]
Tangible Equity Units (TEUs) issued during period, (units)			4,600,000														2,800,000	4,600,000	3,000,000
Senior amortizing notes exchanged for Tangible Equity Units																	7,200,000
Convertible Subordinated Debt [Abstract]
Fixed conversion ratio (shares per $25)																							0.8909
Number of common stock exchanged for debt (shares)																																											0.6	2.2					0.4
Value of convertible debt exchanged for common stock																						48,100,000
Inducement expense recognized																						2,000,000
Junior Subordinated Notes [Abstract]
Effective period of debt instrument interest rate																									10 years
Three-month LIBOR																									three-month LIBOR					LIBOR
Spread on three-month LIBOR rate (percent)																									2.45%						0.40%
Debt instrument variable rate floor (percent)																									4.25%
Debt instrument variable rate cap (percent)																									9.25%
Debt instrument redemption price (percent)						100.00%																					75.00%														100.00%	103.313%			101.00%	106.625%	100.00%
Annual redemption price rate increase (percent)																									1.785%
Unamortized accretion	2,944,000	3,082,000		2,944,000	3,082,000																				(48,700,000)
Secured Debt [Abstract]
Long-term debt	1,496,951,000	1,498,198,000		1,199,344,000	1,201,067,000				250,000,000											9,402,000	9,402,000				52,120,000	51,603,000					227,368,000	227,368,000		8,717,000	8,758,000													9,400,000
Combined total of loan facilities																																	$ 275,000,000
Weighted average fixed interest rate of debt (percent)																																		3.81%