Net Income (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Potentially Dilutive Weighted Average Securities Excluded From the Calculation of Diluted Net Income (Loss) Per Share Attributable to Common Stockholders

The following potentially dilutive weighted average securities were excluded from the calculation of diluted net income (loss) per share attributable to common stockholders during the periods presented, as the effect was anti-dilutive:



	Three Months Ended June 30, 2018	Three Months Ended June 30, 2017	Six Months Ended June 30, 2018	Six Months Ended June 30, 2017
Stock appreciation rights	347	1,297,282	240,303	1,446,618
2019 Convertible Senior Notes	4,358,629	5,567,112	5,178,146	5,567,112
2036 Convertible Senior Notes	10,087,669	14,106,725	11,574,051	14,106,725
Total	14,446,645	20,971,119	16,992,500	21,120,455

Calculation of Diluted Net Income (Loss) Per Share

The following table presents the calculation of diluted net income (loss) per share:



	Three Months Ended June 30, 2018		Three Months Ended June 30, 2017			Six Months Ended June 30, 2018		Six Months Ended June 30, 2017
Net income (loss) attributable to the Company’s common stockholders - Basic	$	32,956	$	(34,809	)	$	241,983	$	(50,723	)
Less: effect of participating securities	—		—			—		—
Net income (loss) attributable to common stockholders - Dilutive	$	32,956	$	(34,809	)	$	241,983	$	(50,723	)
Shares:
Weighted-average shares used to compute basic net income per share	37,413,387		38,679,849			38,112,531		38,639,672
Adjustment to reflect conversion of convertible notes	4,333,570		—			2,377,998		—
Adjustment to reflect stock appreciation right conversions	332,987		—			222,585		—
Weighted-average shares used to compute diluted net income per share	42,079,944		38,679,849			40,713,114		38,639,672
Net income (loss) per share attributable to common stockholders:
Diluted	$	0.78	$	(0.90	)	$	5.94	$	(1.31	)