Retirement and Deferred Compensation Plan	12 Months Ended
Sep. 30, 2017
Compensation and Retirement Disclosure [Abstract]
Retirement and Deferred Compensation Plan	Retirement and Deferred Compensation Plans 401(k) Retirement Plan. We sponsor a defined-contribution plan that is a tax-qualified retirement plan under section 401(k) of the Internal Revenue Code (the Plan). Substantially all employees are eligible for participation in the Plan after completing one calendar month of service. Participants may defer and contribute from 1% to 80% of their salary to the Plan, with certain limitations on highly compensated individuals. We match 50% of the first 6% of the participant's contributions. The participant's contributions vest immediately, while the Company's contributions vest over five years. Our total contributions for the fiscal years ended September 30, 2017, 2016 and 2015 were approximately $3.0 million, $2.6 million and $2.4 million, respectively. During fiscal 2017, 2016 and 2015, participants forfeited $0.6 million, $0.4 million and $0.5 million, respectively, of unvested matching contributions. Deferred Compensation Plan. The Beazer Homes USA, Inc. Deferred Compensation Plan (the DCP) is a non-qualified deferred compensation plan for a select group of executives and highly compensated employees. The DCP allows the executives to defer current compensation on a pre-tax basis to a future year, until termination of employment. The objectives of the DCP are to assist executives with financial planning and capital accumulation and to provide the Company with a method of attracting, rewarding and retaining executives. Participation in the DCP is voluntary. Beazer Homes may voluntarily make a contribution to the participants' DCP accounts. Deferred compensation assets of $1.1 million and $0.8 million and deferred compensation liabilities of $3.8 million and $3.0 million as of September 30, 2017, and 2016, respectively, are included in other assets and other liabilities on our consolidated balance sheets, and are recorded at fair value. For the years ended September 30, 2017, 2016 and 2015, we contributed approximately $268.0 thousand, $204.0 thousand and $227.0 thousand, respectively, to the DCP in the form of voluntary contributions.

Retirement and Deferred Compensation Plans

401(k) Retirement Plan. We sponsor a defined-contribution plan that is a tax-qualified retirement plan under section 401(k) of the Internal Revenue Code (the Plan). Substantially all employees are eligible for participation in the Plan after completing one calendar month of service. Participants may defer and contribute from 1% to 80% of their salary to the Plan, with certain limitations on highly compensated individuals. We match 50% of the first 6% of the participant's contributions. The participant's contributions vest immediately, while the Company's contributions vest over five years. Our total contributions for the fiscal years ended September 30, 2017, 2016 and 2015 were approximately $3.0 million, $2.6 million and $2.4 million, respectively. During fiscal 2017, 2016 and 2015, participants forfeited $0.6 million, $0.4 million and $0.5 million, respectively, of unvested matching contributions.

Deferred Compensation Plan. The Beazer Homes USA, Inc. Deferred Compensation Plan (the DCP) is a non-qualified deferred compensation plan for a select group of executives and highly compensated employees. The DCP allows the executives to defer current compensation on a pre-tax basis to a future year, until termination of employment. The objectives of the DCP are to assist executives with financial planning and capital accumulation and to provide the Company with a method of attracting, rewarding and retaining executives. Participation in the DCP is voluntary. Beazer Homes may voluntarily make a contribution to the participants' DCP accounts. Deferred compensation assets of $1.1 million and $0.8 million and deferred compensation liabilities of $3.8 million and $3.0 million as of September 30, 2017, and 2016, respectively, are included in other assets and other liabilities on our consolidated balance sheets, and are recorded at fair value. For the years ended September 30, 2017, 2016 and 2015, we contributed approximately $268.0 thousand, $204.0 thousand and $227.0 thousand, respectively, to the DCP in the form of voluntary contributions.