Shareholders' Equity

9 Months Ended

Sep. 30, 2020

Equity [Abstract]

Shareholders' Equity

Shareholders’ Equity

The following table details activity in our common stock:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2020			2019			2020			2019
	Shares	Amount		Shares	Amount		Shares	Amount		Shares	Amount
Purchases of treasury shares	—	$	(2)	—	$	—	(59)	$	(15,484)	(72)	$	(14,289)
Stock option exercises	72	8,395		395	40,163		989	100,732		691	62,295
Employee stock plan purchases	11	3,032		15	2,718		31	8,209		43	7,327
Restricted stock units vested, net of withheld shares upon award settlement	2	$	(316)	1	$	(191)	45	$	(7,208)	38	$	(3,572)

As of September 30, 2020, we have authorization from our board of directors to repurchase up to 2.5 million additional shares of our common stock.