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Stock Compensation Plans: Schedule of Expenses for Stock Compensation Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 125 $ 104 $ 80
Related tax benefit recognized (2) (10) (8)
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense 127 112 49
Stock Grants | MRDP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 0 $ 2 $ 39