Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

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

	For the Three Months Ended March 31,
	2013	2012
Shares outstanding for basic earnings per share:	54,588	55,208
Shares outstanding for diluted earnings per share:
Shares outstanding for basic earnings per share	54,588	55,208
Dilutive effect of share-based payment awards	902	1,231
	55,490	56,439

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

	For the Three Months Ended March 31,
	2013	2012
Weighted average number of shares underlying anti-dilutive options	441	618
Weighted average number of shares underlying anti-dilutive restricted stock units	0	50