Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Stock-Based Compensation

Summary of option activity

	Outstanding Options
	Number of	Weighted-Average
	Shares	Exercise Price
	(In thousands)
Balance at December 31, 2016	3,606	$	25.07
Options granted	624	$	27.48
Options exercised	(290)	$	20.91
Options forfeited	(15)	$	28.67
Options expired	(3)	$	20.48
Balance at March 31, 2017	3,922	$	25.75
Exercisable at March 31, 2017	2,540	$	24.58
Vested and expected to vest at March 31, 2017	3,803	$	25.69

Summary of RSU activity

		Weighted-Average
	Number of	Grant Date Fair
	Shares	Value
	(In thousands)
Balance at December 31, 2016	871	$	28.42
RSUs granted	523	$	27.88
RSUs vested	(330)	$	28.76
RSUs cancelled	(22)	$	28.23
Balance at March 31, 2017	1,042	$	28.04

Schedule of share-based compensation expense

	Three Months Ended
	March 31,
	2017		2016
	(In thousands)
Cost of product revenues	$	191	$	176
Research and development		1,389		1,237
Selling and marketing		1,511		1,438
General and administrative		2,014		1,691
Total	$	5,105	$	4,542