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Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Sep. 30, 2016
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans 401(k) Plan—The Company has a 401(k) defined contribution profit sharing plan that covers substantially all employees. Under the plan, employees may contribute up to 75% of their compensation subject to certain exceptions and limitations. In addition, employees who meet certain age requirements may contribute additional amounts permitted by law under the plan. The Company makes matching contributions to the plan up to the first 4% of employee contributions and is permitted to make discretionary contributions under the plan. The amounts contributed to the plan by the Company were $1,014, $936 and $890 for the years ended September 30, 2016, 2015 and 2014, respectively.