Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share

Basic and diluted earnings per share are reconciled as follows (in thousands, except for per share amounts):

	Year Ended December 31,
	2018			2017			2016
Basic net income (loss) per share:
Net income (loss) available to common shareholders	$	(971	)	$	(15,345	)	$	44,949
Weighted average common shares outstanding	44,429			46,281			46,900
Basic net income (loss) per share	$	(0.02	)	$	(0.33	)	$	0.96
Diluted net income (loss) per share:
Net income (loss) available to common shareholders	$	(971	)	$	(15,345	)	$	44,949
Weighted average common shares outstanding	44,429			46,281			46,900
Dilutive stock options, restricted stock, and ESPP purchase rights	—			—			897
Weighted average common shares outstanding for purposes of computing diluted net income (loss) per share	44,429			46,281			47,797
Diluted net income (loss) per share	$	(0.02	)	$	(0.33	)	$	0.94

Summary of Anti-dilutive Securities Excluded from Computation of Earnings Per Share

Potential shares of common stock that were not included in the determination of diluted net income (loss) per share for the periods presented because the impact of including them would have been anti-dilutive or because their performance conditions have not been met, consisted of the following (in thousands):

	Year Ended December 31,
	2018	2017	2016
Options	63	138	—
RSUs & PSUs	1,110	692	183
ESPP purchase rights	203	160	10
Total potential shares of common stock excluded from the computation of diluted earnings per share	1,376	990	193