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Share-Based Compensation - Restricted Stock Plan (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2015
Jul. 02, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 1,500,000  
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted 974,919  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 3.2 $ 2.6
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition - Restricted Stock 2 years 2 months 1 day