NEW ACCOUNTING STANDARDS (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2018	Oct. 01, 2019	Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member	us-gaap:AccountingStandardsUpdate201409Member
Right-of-use operating lease assets	$ 408,434
Operating Lease, Liability	$ 431,637
Build-to-suit liability				$ 90,292
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use operating lease assets			$ 359,200
Operating Lease, Liability			366,800
Build-to-suit asset			90,300
Build-to-suit liability			$ 90,300