EMPLOYEE BENEFIT PLANS - Activity for Option Plans (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Shares Under Option
Options outstanding, beginning balance (in shares) | shares	1,022
Granted (in shares) | shares	358
Exercised (in shares) | shares	(492)
Forfeited (in shares) | shares	(25)
Options outstanding, ending balance (in shares) | shares	863
Options exercisable, ending balance (in shares) | shares	182
Weighted-Average Exercise Price
Options outstanding, beginning balance (in dollars per share) | $ / shares	$ 143.04
Granted (in dollars per share) | $ / shares	218.06
Exercised (in dollars per share) | $ / shares	128.34
Forfeited (in dollars per share) | $ / shares	182.46
Options outstanding, ending balance (in dollars per share) | $ / shares	181.44
Options exercisable, ending balance (in dollars per share) | $ / shares	$ 137.54