Employee Benefit Plans	6 Months Ended
Employee Benefit Plans	Mar. 31, 2015
Compensation Related Costs [Abstract]
EMPLOYEE BENEFIT PLANS	EMPLOYEE BENEFIT PLANS Restricted Stock Units In November 2014, the Compensation Committee of the Company's Board of Directors approved and granted a total of 290,000 performance based restricted stock units (Performance RSUs) to the Chairman of the Board, Chief Executive Officer and Chief Operating Officer of the Company that vest at the end of a three-year performance period ending September 30, 2017. The number of units that ultimately vest depends on the Company's relative position as compared to its peers at the end of the three-year period in achieving certain performance criteria and can range from 0% to 200% of the number of units granted. The performance criteria are total shareholder return, return on investment, SG&A expense containment and gross profit. Each Performance RSU represents the contingent right to receive one share of the Company's common stock if the vesting conditions are satisfied. The Performance RSUs have no dividend or voting rights during the performance period. The fair value of these equity awards on the date of grant was $23.62 per unit. Compensation expense related to this grant was $0.7 million and $1.3 million, respectively, for the three and six months ended March 31, 2015, based on the Company's performance against the peer group, the elapsed portion of the performance period and the grant date fair value of the award. In November 2014, the Compensation Committee also approved and granted an award of 30,000 restricted stock units (RSUs) to the Chief Financial Officer of the Company that vest annually in equal installments over a three-year period ending in November 2017. Each RSU represents the contingent right to receive one share of the Company's common stock if the vesting conditions are satisfied. The RSUs have no dividend or voting rights during the vesting period. The fair value of this equity award on the date of grant was $21.88 per unit. Compensation expense related to this grant was $0.1 million in the six months ended March 31, 2015. In March 2015, the Compensation Committee of the Board of Directors and the Board of Directors approved and granted awards of approximately 2.0 million RSUs to the executive officers, other key employees and non-management directors of the Company. The RSUs were awarded to approximately 570 recipients and vest annually in equal installments over periods of three to five years. Each RSU represents the contingent right to receive one share of the Company's common stock if the vesting conditions are satisfied. The RSUs have no dividend or voting rights during the vesting period. RSUs generally result in less dilution to shareholders than stock options, which have been granted to key employees in the past. RSUs also provide an immediate, tangible value to the recipient and better diversification than stock options alone, which promotes the retention of key employees over the multi-year vesting period. The average fair value of these equity awards on the date of grant was $26.09 per unit. Compensation expense related to this grant was $3.8 million in the three and six months ended March 31, 2015.

The entire disclosure for compensation costs, including compensated absences accruals, compensated absences liability, deferred compensation arrangements and income statement compensation items. Deferred compensation arrangements may include a description of an arrangement with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain amounts at designated future dates, usually including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares (units) issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability.

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