Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Earnings (loss) per share:

Computation of earnings per share and reconciliation of basic and diluted weighted average common shares outstanding

The table below presents the computation of earnings per share, including the reconciliation of basic and diluted weighted average shares outstanding (in thousands, except per share data):

			Year Ended December 31,
				2011		2010		2009
Net income			$	71,993	$	57,638	$	19,202
Weighted average shares outstanding:
	Basic			48,158		49,469		48,649
	Effect of dilutive securities:
		Stock options and employee stock purchase plan		829		692		400
	Diluted			48,987		50,161		49,049
Earnings per share:
	Basic		$	1.49	$	1.17	$	0.39
	Diluted		$	1.47	$	1.15	$	0.39
Anti-dilutive stock options excluded from diluted earnings per share computations (1)				1,381		1,964		3,355

(1) Since these options have exercise prices that are higher than the average market prices of our common stock, including them in the calculation would have an anti-dilutive effect on earnings per share.