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RETIREMENT PLANS - FAIR VALUE (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Plan assets    
Entity's stock included in plan assets $ 4  
Pension plan assets at the fair value    
Fair value measurements 6,488 $ 7,022
Quoted Prices in Active Markets (Level 1)    
Pension plan assets at the fair value    
Fair value measurements $ 6,488 $ 7,022
Cash and cash equivalents    
Entity's year-end target allocation, by asset category, and the actual asset allocations    
Target allocation, minimum 0.00%  
Target allocation, maximum 30.00%  
Actual asset allocation 9.00% 12.00%
Fixed income securities    
Entity's year-end target allocation, by asset category, and the actual asset allocations    
Target allocation, minimum 20.00%  
Target allocation, maximum 60.00%  
Actual asset allocation 22.00% 20.00%
Equity securities    
Entity's year-end target allocation, by asset category, and the actual asset allocations    
Target allocation, minimum 30.00%  
Target allocation, maximum 70.00%  
Actual asset allocation 69.00% 68.00%
Cash    
Pension plan assets at the fair value    
Fair value measurements $ 621 $ 817
Cash | Quoted Prices in Active Markets (Level 1)    
Pension plan assets at the fair value    
Fair value measurements 621 817
Corporate bonds    
Pension plan assets at the fair value    
Fair value measurements 354 660
Corporate bonds | Quoted Prices in Active Markets (Level 1)    
Pension plan assets at the fair value    
Fair value measurements 354 660
Fixed income exchange-traded funds    
Pension plan assets at the fair value    
Fair value measurements 819 521
Fixed income exchange-traded funds | Quoted Prices in Active Markets (Level 1)    
Pension plan assets at the fair value    
Fair value measurements 819 521
Preferred securities    
Pension plan assets at the fair value    
Fair value measurements 230 232
Preferred securities | Quoted Prices in Active Markets (Level 1)    
Pension plan assets at the fair value    
Fair value measurements 230 232
Equity securities exchange- traded funds    
Pension plan assets at the fair value    
Fair value measurements 764 758
Equity securities exchange- traded funds | Quoted Prices in Active Markets (Level 1)    
Pension plan assets at the fair value    
Fair value measurements 764 758
Equities    
Pension plan assets at the fair value    
Fair value measurements 3,700 4,034
Equities | Quoted Prices in Active Markets (Level 1)    
Pension plan assets at the fair value    
Fair value measurements $ 3,700 $ 4,034