Annual report pursuant to Section 13 and 15(d)

Employee Benefits Plans - Summary of Roll-forward of the MSP Benefit Obligation (Details)

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Employee Benefits Plans - Summary of Roll-forward of the MSP Benefit Obligation (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Change in projected benefit obligation:      
Benefit obligation at beginning of year $ 4,198 $ 4,371  
Service cost 195 195 $ 221
Interest cost 197 (23) 368
Benefits paid (345) (345)  
Recognized actuarial loss adjustment 231 0 0
Benefit obligation at end of year 4,476 4,198 $ 4,371
Funded status at end of year $ (4,476) $ (4,198)