Investments in Unconsolidated Entities Narrative (Details) (USD $)	6 Months Ended		12 Months Ended		3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013	May 03, 2012	Mar. 31, 2014 South Edge	Mar. 31, 2014 Inspirada	Mar. 31, 2014 the REIT	May 03, 2012 the REIT home	Mar. 31, 2014 Financial Guarantee [Member]	Sep. 30, 2013 Financial Guarantee [Member]
Schedule of Equity Method Investments [Line Items]
Guarantor Obligations, Current Carrying Value									$ 0	$ 0
Settlement of unconsolidated entity debt obligation	0	500,000			1,000,000
Joint Venture Obligation						5,700,000
Equity Method Investments				300,000
Number of pre-owned homes owned				190
Number of Pre-owned homes owned and leased								187
Beazer homes' ownership interest in guarantor subsidiaries (less than 10% in Inspirada Builders LLC)	100.00%						15.00%	23.50%
Payment to settle repayment guarantee obligation			500,000
Other income recorded on settlement of guarantee obligation			$ 200,000