Income Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Calculation of basic and diluted net income per share

The following table presents the calculation of basic and diluted net income per share (in thousands, except per share data):

	Three Months Ended June 30,								Six Months Ended June 30,
	2013				2012				2013				2012
	Class A		Class B		Class A		Class B		Class A		Class B		Class A		Class B
Basic net income per share:
Numerator:
Allocation of undistributed earnings	$	3,108	$	626	$	1,863	$	948	$	21,810	$	4,540	$	4,386	$	3,414
Denominator:
Weighted-average common shares outstanding	92,560		18,654		69,063		35,122		91,325		19,009		58,024		45,174
Basic net income per share	$	0.03	$	0.03	$	0.03	$	0.03	$	0.24	$	0.24	$	0.08	$	0.08
Diluted net income per share:
Numerator:
Allocation of undistributed earnings for basic computation	$	3,108	$	626	$	1,863	$	948	$	21,810	$	4,540	$	4,386	$	3,414
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	626		—		948		—		4,540		—		3,414		—
Reallocation of undistributed earnings to Class B shares	—		103		—		122		—		791		—		4
Allocation of undistributed earnings	$	3,734	$	729	$	2,811	$	1,070	$	26,350	$	5,331	$	7,800	$	3,418
Denominator:
Number of shares used in basic calculation	92,560		18,654		69,063		35,122		91,325		19,009		58,024		45,174
Weighted-average effect of dilutive securities
Add:
Conversion of Class B to Class A common shares outstanding	18,654		—		35,122		—		19,009		—		45,174		—
Employee stock options	4,294		4,109		7,794		7,638		4,645		4,464		8,362		3,819
RSUs and other dilutive securities	1,119		—		338		—		1,038		—		253		—
Number of shares used in diluted calculation	116,627		22,763		112,317		42,760		116,017		23,473		111,813		48,993
Diluted net income per share	$	0.03	$	0.03	$	0.03	$	0.03	$	0.23	$	0.23	$	0.07	$	0.07

Weighted-average employee stock options excluded from the calculation of diluted net income per share

The following weighted-average employee equity awards were excluded from the calculation of diluted net income per share because their effect would have been anti-dilutive for the periods presented (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	2013	2012	2013	2012
Employee stock options	703	28	480	40
RSUs	197	—	324	62
Total	900	28	804	102