Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2012	2011
Denominator – basic	148,495	148,069
Stock options	—	13
Deemed shares related to deferred compensation arrangements	43	41
Denominator – diluted	148,538	148,123