Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Schedule of earnings per share

The following summarizes the impact of potential dilutive common shares on the denominator used to compute EPS:

	Three Months Ended June 30,		Six Months Ended June 30,
	2012	2011	2012	2011
Denominator – basic	150,913	148,356	149,704	148,214
Stock options	—	1	—	7
Deemed shares related to deferred compensation arrangements	41	41	42	41
Denominator – diluted	150,954	148,398	149,746	148,262