Net Income Per Common Share (Tables)

6 Months Ended

Jun. 30, 2012

Net Income Per Common Share [Abstract]

Schedule Of Earnings Per Share

	Six Months Ended		Three Months Ended
	June 30,		June 30,
	2012	2011	2012	2011
Average common shares outstanding during
the period for basic computation	138,935	137,971	139,108	138,114
Dilutive effect of employee stock-based compensation	642	547	735	667
Average common shares outstanding during
the period for diluted computation	139,577	138,518	139,843	138,781