NEW ACCOUNTING STANDARDS (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Oct. 01, 2019	Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liability	$ 369,742
Right-of-use operating lease assets	361,036		$ 0
Build-to-suit liability	$ 0		$ 90,292
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liability		$ 366,800
Right-of-use operating lease assets		359,200
Build-to-suit asset		90,300
Build-to-suit liability		$ 90,300