LONG-TERM DEBT - Schedule of Senior Secured Credit Facilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total Senior Secured Credit Facilities	$ 13,283,883	$ 12,925,802
Senior Secured Credit Facilities
Debt Instrument [Line Items]
Total Senior Secured Credit Facilities	6,300,000	6,300,000
Senior Secured Credit Facilities | Term Loan D
Debt Instrument [Line Items]
Total Senior Secured Credit Facilities	5,000,000	5,000,000
Senior Secured Credit Facilities | Term Loan E
Debt Instrument [Line Items]
Total Senior Secured Credit Facilities	$ 1,300,000	$ 1,300,000