Shareholders' Equity

6 Months Ended

Jun. 30, 2020

Equity [Abstract]

Shareholders' Equity

Shareholders’ Equity

The following table details activity in our common stock:

	Three Months Ended June 30,						Six Months Ended June 30,
	2020			2019			2020			2019
	Shares	Amount		Shares	Amount		Shares	Amount		Shares	Amount
Purchases of treasury shares	—	$	—	—	$	—	(59)	$	(15,482)	(72)	$	(14,289)
Stock option exercises	436	46,101		203	15,604		917	92,337		297	22,132
Employee stock plan purchases	10	2,708		13	2,260		20	5,177		28	4,609
Restricted stock units vested, net of withheld shares upon award settlement	33	$	(4,591)	27	$	(2,008)	43	$	(6,892)	37	$	(3,381)

As of June 30, 2020, we have authorization from our board of directors to repurchase up to 2.6 million additional shares of our common stock.