SHAREHOLDERS’ EQUITY

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

SHAREHOLDERS’ EQUITY

SHAREHOLDERS’ EQUITY

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)

As of February 23, 2022, we had authorization from our board of directors to repurchase up to 2.4 million additional shares of our common stock.