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COMMITMENTS AND CONTINGENT LIABILITIES (Details) - USD ($)
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Aug. 31, 2009
Commitments and Contingencies Disclosure [Abstract]        
Operating leases, rent expense, net $ 29,166,000 $ 29,556,000 $ 27,784,000  
Aggregate future minimum lease payments for operating leases in 2015 24,914,000      
Aggregate future minimum lease payments for operating leases in 2016 23,887,000      
Aggregate future minimum lease payments for operating leases in 2017 20,368,000      
Aggregate future minimum lease payments for operating leases in 2018 15,299,000      
Aggregate future minimum lease payments for operating leases in 2019 7,864,000      
Aggregate future minimum lease payments for operating leases thereafter 13,810,000      
Net capital cost value       $ 5,000,000
Obligation under consent order 0      
Net capital cost value in proposed remedial action plan       $ 10,000,000
Loss contingency claim asserted $ 0