STOCK BASED COMPENSATION - Stock Option Activity (Detail) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Number of Options
Outstanding at beginning of year	5,377,857
Granted	959,551
Exercised	(791,434)
Forfeited	(138,249)
Canceled or expired	(1,876)
Outstanding at September 30, 2015	5,405,849
Exercisable at September 30, 2015	2,837,919
Vested and expected to vest at September 30, 2015	5,183,104
Weighted Average Exercise Price per Share
Outstanding at beginning of year | $ / shares	$ 80.88
Granted | $ / shares	131.20
Exercised | $ / shares	67.83
Forfeited | $ / shares	108.71
Canceled or expired | $ / shares	76.08
Outstanding at September 30, 2015 | $ / shares	91.02
Exercisable at September 30, 2015 | $ / shares	72.66
Vested and expected to vest at September 30, 2015 | $ / shares	$ 89.90
Weighted Average Remaining Contractual Life
Outstanding at September 30, 2015	5 years 10 months 21 days
Exercisable at September 30, 2015	4 years 11 months 12 days
Total Aggregate Intrinsic Value
Outstanding at September 30, 2015 | $	$ 261,110
Exercisable at September 30, 2015 | $	$ 189,143