BASIS OF PRESENTATION AND OTHER INFORMATION Impact of Adoption of Lease Accounting Standard (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets	$ 1,145,487		$ 0
Present value of lease liabilities	$ 1,214,837
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets		$ 1,100,000
Present value of lease liabilities		1,200,000
Reduction of operating lease assets upon adoption of lease guidance		$ 85,300