Shareholders' Equity

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Shareholders' Equity

Shareholders’ Equity

The following table details activity in our common stock (in thousands):

	Three Months Ended September 30,							Nine Months Ended September 30,
	2019				2018			2019					2018
	Shares	Amount			Shares	Amount		Shares		Amount			Shares	Amount
Purchases of treasury shares	—	$	—		—	$	—	(72	)	$	(14,289	)	—	$	—
Stock option exercises	395	40,163			326	26,219		691		62,295			1,048	70,536
Employee stock plan purchases	15	2,718			12	2,218		43		7,327			35	5,978
Restricted stock units vested, net of withheld shares upon award settlement	1	$	(191	)	—	$	—	38		$	(3,572	)	—	$	—

As of September 30, 2019, we had authorization from our board of directors to repurchase up to 2.6 million additional shares of our common stock.