SHAREHOLDERS’ EQUITY (Tables)

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Summary of activities in common stock

The following table details activity in our common stock:

	Years Ended December 31,
	2021			2020			2019
	Shares	Amount		Shares	Amount		Shares	Amount
Stock option exercises	627	$	96,714	1,174	$	124,363	999	$	96,908
Purchases of common stock	(33)	(12,977)		(59)	(15,484)		(72)	(14,289)
Employee stock plan purchases	35	13,158		40	10,912		53	9,576
Restricted stock units vested, net of withheld shares upon award settlement	147	(25,158)		76	(12,923)		53	(5,361)