LONG-TERM DEBT - Schedule of Outstanding Senior Notes (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Nov. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total Legacy Notes	$ 20,649,181	$ 365,000	$ 20,364,988
Legacy Notes
Debt Instrument [Line Items]
Total Legacy Notes	475,000		475,000
Legacy Notes | 6.875% Senior Notes Due 2018
Debt Instrument [Line Items]
Total Legacy Notes	$ 175,000		$ 175,000
Stated interest rate	6.875%		6.875%
Legacy Notes | 7.25% Senior Notes Due 2027
Debt Instrument [Line Items]
Total Legacy Notes	$ 300,000		$ 300,000
Stated interest rate	7.25%		7.25%