Common Stock Activity (Tables)

12 Months Ended

Dec. 31, 2011

Common Stock Activity [Abstract]

Schedule Of Common Stock And Treasury Stock Activity

	Common Shares Outstanding			Treasury Shares
Balance as of December 31, 2009		75,954,004			—
Shares issued for stock options		231,599
Shares issued for restricted stock		96,426
Other shares issued		58,160
Shares issued for acquisition		1,875,000
Balance as of December 31, 2010		78,215,189			—
Shares issued for stock options		1,132,396
Shares issued for restricted stock		613,198
Other shares issued		72,102
Shares issued for acquisition		5,129,642
Common stock repurchases		(4,593,663	)		4,593,663
Balance as of December 31, 2011		80,568,864			4,593,663