Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Schedule Of Reconciliation Of Shares Outstanding For Basic And Diluted Earnings Per Share

	For the Three Months Ended March 31,
	2012		2011
Shares outstanding for basic earnings per share:		55,208		57,457
Shares outstanding for diluted earnings per share:
Shares outstanding for basic earnings per share		55,208		57,457
Dilutive effect of share-based payment awards		1,231		1,633
		56,439		59,090

Schedule Of Number Of Anti-Dilutive Stock Options And Restricted Stock Units

	For the Three Months Ended March 31,
	2012		2011
Weighted average number of shares underlying anti-dilutive options		618		256
Weighted average number of shares underlying anti-dilutive restricted stock units		50		53