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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details 2) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Goodwill and Intangible Assets:    
Impairment of goodwill, indefinite-lived assets or identifiable intangible assets with finite lives $ 0 $ 0
Insurance    
Letter of credit issued for worker's compensation insurance carrier as part of the entity's self-insured loss control program $ 0.4  
Number of months of claims used to calculate the reserve for incurred, but not reported, employee health care benefits 1 month  
Buildings
   
Property and Equipment    
Estimated useful lives 40 years  
Warehouse equipment | Minimum
   
Property and Equipment    
Estimated useful lives 5 years  
Warehouse equipment | Maximum
   
Property and Equipment    
Estimated useful lives 7 years  
Furniture, fixtures and leasehold improvements | Minimum
   
Property and Equipment    
Estimated useful lives 2 years  
Furniture, fixtures and leasehold improvements | Maximum
   
Property and Equipment    
Estimated useful lives 12 years  
Vehicles
   
Property and Equipment    
Estimated useful lives 5 years