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Income (Loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Schedule of calculations of basic and diluted net income per share
The following table presents the calculation of basic and diluted net income (loss) per share attributable to common stockholders (in thousands, except per share data):
 
 
Year Ended December 31,
 
2015
 
2014
 
2013
 
Class A
 
Class B
 
Class A
 
Class B
 
Class A
 
Class B
Basic net income (loss) per share attributable to common stockholders:
 
 
 
 
 
 
 
 
 
 
 
Numerator:
 
 
 
 
 
 
 
 
 
 
 
Allocation of undistributed earnings
$
(145,978
)
 
$
(20,166
)
 
$
(13,659
)
 
$
(2,088
)
 
$
22,443

 
$
4,326

Denominator:
 
 
 
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding
113,364

 
15,660

 
106,518

 
16,282

 
95,282

 
18,361

Basic net income (loss) per share attributable to common stockholders
$
(1.29
)
 
$
(1.29
)
 
$
(0.13
)
 
$
(0.13
)
 
$
0.24

 
$
0.24

Diluted net income (loss) per share attributable to common stockholders:
 
 
 
 
 
 
 
 
 
 
 
Numerator:
 
 
 
 
 
 
 
 
 
 
 
Allocation of undistributed earnings for basic computation
$
(145,978
)
 
$
(20,166
)
 
$
(13,659
)
 
$
(2,088
)
 
$
22,443

 
$
4,326

Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares
(20,166
)
 
—

 
(2,088
)
 
—

 
4,326

 
—

Reallocation of undistributed earnings to Class B shares
—

 
—

 
—

 
—

 
—

 
713

Allocation of undistributed earnings
$
(166,144
)
 
$
(20,166
)
 
$
(15,747
)
 
$
(2,088
)
 
$
26,769

 
$
5,039

Denominator:
 
 
 
 
 
 
 
 
 
 
 
Number of shares used in basic calculation
113,364

 
15,660

 
106,518

 
16,282

 
95,282

 
18,361

Weighted-average effect of dilutive securities
 
 
 
 
 
 
 
 
 
 
 
Add:
 
 
 
 
 
 
 
 
 
 
 
Conversion of Class B to Class A common shares outstanding
15,660

 
—

 
16,282

 
—

 
18,361

 
—

Employee stock options
—

 
—

 
—

 
—

 
4,128

 
4,025

RSUs and other dilutive securities
—

 
—

 
—

 
—

 
1,173

 
—

Number of shares used in diluted calculation
129,024

 
15,660

 
122,800

 
16,282

 
118,944

 
22,386

Diluted net income (loss) per share attributable to common stockholders
$
(1.29
)
 
$
(1.29
)
 
$
(0.13
)
 
$
(0.13
)
 
$
0.23

 
$
0.23
Schedule of weighted-average employee equity awards excluded from calculations of diluted net income per share
The following weighted-average employee equity awards were excluded from the calculation of diluted net income (loss) per share attributable to common stockholders because their effect would have been anti-dilutive for the periods presented (in thousands):
 
 
Year Ended December 31,
 
2015
 
2014
 
2013
Employee stock options
2,820

 
4,093

 
588

RSUs and other equity
6,090

 
4,844

 
162

Total
8,910

 
8,937

 
750