LONG-TERM DEBT - SCHEDULE OF DEBT INSTRUMENT REDEMPTION (Details) - Senior Notes	12 Months Ended
	Dec. 31, 2015
4.875% Senior Notes, due November 30, 2018 | Redemption, Period One
Debt Instrument
Redemption percentage	103.25%
4.875% Senior Notes, due November 30, 2018 | Redemption, Period Two
Debt Instrument
Redemption percentage	101.625%
4.875% Senior Notes, due November 30, 2018 | Redemption, Period Three
Debt Instrument
Redemption percentage	100.00%
4.75% Senior Notes, due December 2022 | Redemption, Period One
Debt Instrument
Redemption percentage	102.375%
4.75% Senior Notes, due December 2022 | Redemption, Period Two
Debt Instrument
Redemption percentage	101.583%
4.75% Senior Notes, due December 2022 | Redemption, Period Three
Debt Instrument
Redemption percentage	100.792%
4.75% Senior Notes, due December 2022 | Redemption, Period Four
Debt Instrument
Redemption percentage	100.00%