Retirement Plan and Incentive Awards (Details) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 1,200,000
Employer matching contribution (percentage)	50.00%
Maximum percentage of employee gross pay subject to employer match	6.00%
Deferred Compensation Plan, Annual Vesting Percent	100.00%
Deferred Compensation Arrangement with Individual, Requisite Service Period	5 years
Total employer contributions during period	2,000,000	1,100,000	1,300,000
Total matching contributions forfeited by plan participants during period	400,000	500,000	300,000
Deferred compensation plan liabilities	24,270,000	25,579,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	600,000
Intrinsic value of SSARs/stock options vested and expected to vest	1,200,000
Unrecognized compensation cost	10,000,000	1,000,000
Weighted average period to recognize remaining cost	3 years 7 months 6 days
SSARs and Stock Options
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted average expected life of the SSARs / stock options vested and expected to vest	2 years 7 months 6 days
Non-cash stock based compensation expense	800,000	900,000	1,500,000
Performance-based restricted stock issued	161,010	160,651	109,507
Dividend yield for the Company	0.00%	0.00%	0.00%
Expected price volatitlity	45.99%	46.15%	44.77%
Risk-free interest rate	1.42%	0.63%	0.90%
Performance Shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Performance-based restricted stock issued	28,690
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	50.00%
Estimated fair value of nonvested stock ($ per share)	$ 15.90
Dividend yield for the Company	0.00%
Risk-free interest rate	0.66%
Nonvested Stock Awards and Performance Shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Non-cash stock based compensation expense	1,800,000	2,000,000	2,600,000
Performance-based restricted stock issued	595,567	99,413	179,913
Estimated fair value of nonvested stock ($ per share)	$ 18.68	$ 10.95	$ 7.19
Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee deferral and contribution percentage	1.00%
Minimum | Performance Shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected price volatitlity	35.00%
Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee deferral and contribution percentage	80.00%
Maximum | Performance Shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected price volatitlity	59.10%
Beazer Homes USA Inc. Deferred Compensation Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred compensation plan assets	500,000	700,000
Deferred compensation plan liabilities	2,500,000	2,300,000
Deferred compensation plan employer contributions during period	$ 212,000	$ 215,000	$ 205,000
2010 Stock Incentive Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Shares of common stock reserved for issuance under plan	2,300,000
Shares of common stock available for future grants	1,600,000