Net Income (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

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

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,   2016	Three Months   Ended   June 30,   2015	Six Months   Ended   June 30,   2016	Six Months   Ended   June 30,   2015
Options to purchase common stock	87,026	87,026	87,026	87,026
Stock appreciation rights	2,251,132	2,433,636	2,422,353	2,119,168
2019 Convertible notes	9,302,579	10,838,218	10,070,399	10,838,218
2036 Convertible notes	4,495,550	—	2,247,775	—
Total	16,136,287	13,358,880	14,827,553	13,044,412

Calculation of Diluted Net Income Per Share

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

	Three Months   Ended   June 30,   2016		Three Months   Ended   June 30,   2015			Six Months   Ended   June 30,   2016		Six Months   Ended   June 30,   2015
Net income (loss) attributable to the Company’s common stockholders - Basic	$	6,867	$	(2,001	)	$	8,517	$	(40,108	)
Less: effect of participating securities	—		—			—		—
Net income (loss) attributable to common stockholders - Dilutive	$	6,867	$	(2,001	)	$	8,517	$	(40,108	)
Shares:
Weighted-average shares used to compute basic net income (loss) per share	42,407,888		43,736,366			43,153,486		44,048,017
Adjustment to reflect stock appreciation right conversions	10,953		—			5,115		—
Weighted-average shares used to compute diluted net income (loss) per share	42,418,841		43,736,366			43,158,601		44,048,017
Net income (loss) per share attributable to common stockholders:
Diluted	$	0.16	$	(0.05	)	$	0.20	$	(0.91	)