EMPLOYEE BENEFIT PLANS - Activity for Option Plans (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Shares Under Option
Options outstanding, beginning balance (in shares) | shares	863
Granted (in shares) | shares	143
Exercised (in shares) | shares	(320)
Forfeited (in shares) | shares	(9)
Options outstanding, ending balance (in shares) | shares	677
Options exercisable, ending balance (in shares) | shares	178
Weighted-Average Exercise Price
Options outstanding, beginning balance (in dollars per share) | $ / shares	$ 181.44
Granted (in dollars per share) | $ / shares	276.01
Exercised (in dollars per share) | $ / shares	157.44
Forfeited (in dollars per share) | $ / shares	150.59
Options outstanding, ending balance (in dollars per share) | $ / shares	213.17
Options exercisable, ending balance (in dollars per share) | $ / shares	$ 180.76