Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2011

Summary of Common Stock and Additional Paid-in Capital Activity

The following table summarizes the common stock and additional paid-in capital activity during the nine months ended September 30, 2011 (in thousands):

Common stock and additional paid-in capital, December 31, 2010	$	465,467
Income tax benefit of common stock options exercised		4,729
Common stock issued pursuant to stock-based compensation plans, net		10,291
Stock-based compensation expense		19,435
Repurchase of common stock		(124,384	)
Common stock and additional paid in capital, September 30, 2011	$	375,538