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Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Sep. 30, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company has a 401(k) savings plan whereby eligible employees may voluntarily contribute a percentage of their compensation. The Company may, at its discretion, match a portion of the employees’ eligible contributions. Contributions by the Company to the plan during the years ended September 30, 2014, 2013, and 2012 were approximately $7.2 million, $6.4 million and $5.7 million, respectively. Contributions made by the Company vest over four years.