SHAREHOLDERS’ EQUITY - Summary of Activities in Common Stock (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Stock option exercises (in shares)	1,174	999	1,126
Issuance/ Exercise of stock options	$ 124,363	$ 96,908	$ 74,907
Purchases of common stock (in shares)	(59)	(72)	(781)
Purchases of common stock	$ (15,484)	$ (14,289)	$ (150,050)
Employee stock plan purchases (in shares)	40	53	45
Employee stock plan purchases	$ 10,912	$ 9,576	$ 8,051
Restricted stock units vested, net of withheld shares upon award settlement (in shares)	76	53	0
Restricted stock units vested, net of withheld shares upon award settlement	$ (12,923)	$ (5,361)	$ 0