Annual report pursuant to section 13 and 15(d)

Employee Benefits Plans (Schedule of MSP Benefit Expense) (Details)

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Employee Benefits Plans (Schedule of MSP Benefit Expense) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
MSP benefit expense charged to costs and expenses:      
Service cost $ 251 $ 233 $ 265
Interest cost 178 181 186
Recognized actuarial loss (gain)         
Recognized actuarial loss adjustment 2 66 102
Total $ 431 $ 480 $ 553