The following table is a reconciliation of the weighted average shares used in the computation of earnings (loss) per share for the periods presented (in thousands, except per share data):

	Three Months Ended September 30,
	2017								2016
	Income (Loss)			Weighted Average Shares		Per-Share			Income (Loss)		Weighted Average Shares		Per-Share
Earnings (loss) per share — basic
Net income (loss) available to common stockholders	$	(17,614	)		22,772	$	(0.77	)	$	30,612		16,044	$	1.91
Effect of dilutive securities:
Convertible senior notes		—			—					1,840		23,081
Unvested performance stock grants		—			—					—		164
Unvested restricted stock grants		—			—					—		215
Earnings (loss) per share — diluted
Net income (loss) available to common stockholders plus assumed exercises and conversion	$	(17,614	)		22,772	$	(0.77	)	$	32,452		39,504	$	0.82

	Nine Months Ended September 30,
	2017								2016
	Income (Loss)			Weighted Average Shares		Per-Share			Income (Loss)		Weighted Average Shares		Per-Share
Earnings (loss) per share — basic
Net income (loss) available to common stockholders	$	(52,672	)		20,848	$	(2.53	)	$	8,828		16,561	$	0.53
Effect of dilutive securities:
Convertible senior notes		—			—					5,557		23,123
Unvested performance stock grants		—			—					—		115
Unvested restricted stock grants		—			—					—		117
Earnings (loss) per share — diluted
Net income (loss) available to common stockholders plus assumed exercises and conversion	$	(52,672	)		20,848	$	(2.53	)	$	14,385		39,916	$	0.36