STOCK-BASED COMPENSATION - SCHEDULE OF CHANGES IN OUTSTANDING STOCK OPTIONS (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Shares
Balance at beginning of the period (in shares)	6,520,000
Granted (in shares)	2,528,000	700,000	700,000
Exercised (in shares)	(1,536,000)
Forfeited (in shares)	(220,000)
Expired (in shares)	(9,000)
Balance at end of the period (in shares)	7,283,000	6,520,000
Options exercisable (in shares)	3,520,000
Weighted Average Exercise Price
Balance at beginning of the period (in usd per share)	$ 41.19
Granted (in usd per share)	71.17
Exercised (in usd per share)	36.93
Forfeited (in usd per share)	53.75
Expired (in usd per share)	35.68
Balance at end of the period (in usd per share)	52.13	$ 41.19
Options exercisable (in usd per share)	$ 37.16
Weighted Average Remaining Contractual Term
Balance at end of the period (in years)	6 years 10 months 24 days
Options exercisable (in years)	5 years 1 month 6 days
Aggregate Intrinsic Value
Balance at end of the period	$ 91,329
Options exercisable	$ 82,073