Common Stock Activity (Tables)

12 Months Ended

Dec. 31, 2012

Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]

Schedule of Share Activity

A summary of share activity for the periods indicated, which may contain slight summation differences due to rounding, is as follows (in thousands):

	Common Shares Outstanding		Treasury Shares
Balance as of December 31, 2010	78,215		—
Shares issued for stock option exercises	1,132
Shares issued for restricted stock awards	647
Other shares issued	39
Shares issued for acquisition of business	5,130
Common stock repurchases	(4,594	)	4,594
Balance as of December 31, 2011	80,569		4,594
Shares issued for stock option exercises	392
Shares issued for restricted stock awards	348
Other shares issued	13
Common stock repurchases	(4,874	)	4,874
Balance as of December 31, 2012	76,448		9,467