Net Profit Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Schedule Of Earnings Per Share Basic And Diluted

	Three Months Ended, June 30,				Six Months Ended, June 30,
	2013		2012		2013			2012
Numerator:
Net income (loss)	$	29,320	$	28,492	$	(12,663	)	$	49,476
Denominator:
Weighted-average common shares outstanding, basic	80,576		80,384		80,909			79,810
Dilutive effect of potential common stock	1,573		2,570		—			2,636
Total shares, diluted	82,149		82,954		80,909			82,446
Net income (loss) per share, basic	$	0.36	$	0.35	$	(0.16	)	$	0.62
Net income (loss) per share, diluted	$	0.36	$	0.34	$	(0.16	)	$	0.60