Annual report pursuant to Section 13 and 15(d)

COMMITMENTS AND CONTINGENT LIABILITIES (Details)

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COMMITMENTS AND CONTINGENT LIABILITIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]      
Annual rental expense under operating leases $ 36,400 $ 32,716 $ 31,766
Future minimum rental commitments under operating leases [Abstract]      
Fiscal year 2018 21,939    
Fiscal year 2019 15,562    
Fiscal year 2020 11,992    
Fiscal year 2021 8,559    
Fiscal year 2022 5,276    
Employment Agreements      
Long-term Purchase Commitment [Line Items]      
Aggregate commitment amount for salaries $ 5,652