Net Income Per Share Available to Common Stock

The following table sets forth the computation of our basic and diluted net income per share available to common stock (in thousands, except per share amounts):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Numerator:
Basic:
Net income	$	133,722		$	51,257		$	319,368		$	125,406
Less: undistributed earnings allocated to participating securities	(182		)	(295		)	(725		)	(931		)
Net income available to common stockholders, basic	$	133,540		$	50,962		$	318,643		$	124,475
Diluted:
Net income attributable to common stockholders, basic	$	133,540		$	50,962		$	318,643		$	124,475
Add: undistributed earnings allocated to participating securities	15			18			61			56
Net income attributable to common stockholders, diluted	$	133,555		$	50,980		$	318,704		$	124,531
Denominator:
Basic:
Weighted-average shares used in computing net income per share available to common stockholders, basic	72,588			69,076			71,903			68,365
Diluted:
Weighted-average shares used in computing net income per share available to common stockholders, basic	72,588			69,076			71,903			68,365
Add weighted-average effect of dilutive securities:
Stock options and RSUs	6,636			4,357			6,528			4,429
Employee stock purchase plan	98			20			97			17
Weighted-average shares used in computing net income per share available to common stockholders, diluted	79,322			73,453			78,528			72,811
Net income per share attributable to common stockholders:
Basic	$	1.84		$	0.74		$	4.43		$	1.82
Diluted	$	1.68		$	0.69		$	4.06		$	1.71

The following outstanding shares of common stock equivalents were excluded from the computation of diluted net income per share available to common stockholders for the periods presented because including them would have been anti-dilutive (in thousands):



	Three Months Ended September 30,		Nine Months Ended September 30,
	2017	2016	2017	2016
Stock options and RSUs to purchase common stock	14	2,688	73	3,215