Equity Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock-Based Compensation Expense

The following table summarizes our stock-based compensation expense by line item in the consolidated statements of operations (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Cost of sales	$	10,166	$	8,939	$	27,663	$	21,837
Research and development		51,066		40,220		158,052		113,328
Selling, general and administrative		51,421		40,384		146,697		111,347
Total	$	112,653	$	89,543	$	332,412	$	246,512