Shareholders' Equity Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2012

Stockholders' Equity Note [Abstract]

Common stock and additional paid-in capital activity

The following table summarizes the common stock and additional paid-in capital activity during the six months ended June 30, 2012 (in thousands):

Common stock and additional paid-in capital, December 31, 2011	$	352,157
Income tax expense of common stock options exercised	(658		)
Common stock issued pursuant to stock-based compensation plans, net	2,462
Stock-based compensation expense	13,277
Repurchase of common stock	(90,201		)
Common stock and additional paid in capital, June 30, 2012	$	277,037