Net Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2016

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 average number of securities were excluded from the calculation of diluted net income per share attributable to common stockholders during the periods presented as the effect was anti-dilutive:



	Year Ended December 31,
	2016	2015	2014
Options to purchase common stock	43,513	87,026	87,026
Stock appreciation rights	2,422,716	2,072,130	1,400,824
Warrants to purchase common stock	—	—	17,916
2019 Convertible notes	7,895,675	10,838,218	6,295,075
2036 Convertible notes	8,209,651	—	—
Total	18,571,555	12,997,374	7,800,841

Calculation of diluted net income per share

The following table presents the calculation of diluted net income per share for the years ended December 31, 2016, 2015 and 2014 (in thousands, except share and per share data):



	2016			2015			2014
Net income (loss) attributable to the Company's common stockholders - Basic	$	43,453		$	(151,392	)	$	81,620
Plus: distributed dividends to Preferred Stockholders	—			—			40
Plus (less): effect of participating securities	874			—			(418		)
Net income (loss) attributable to common stockholders	44,327			(151,392		)	81,242
Less: effect of participating securities	(874		)	—			—
Net income (loss) attributable to the Company's common stockholders - Diluted	$	43,453		$	(151,392	)	$	81,242
Shares:
Weighted-average shares outstanding - Basic	40,897,549			43,958,803			40,740,411
Adjustment to reflect stock appreciation right conversions	5,311			—			9,502
Weighted-average shares outstanding - Diluted	40,902,860			43,958,803			40,749,913

Net income (loss) per share attributable to common stockholders - Diluted	$	1.06		$	(3.44	)	$	1.99