Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Number of Shares Used to Compute Basic and Diluted Earnings Per Share

Earnings Per Share (“EPS”): The denominator used to compute basic and diluted earnings per share is as follows (in millions):

	Quarter Ended September 30,		Nine Months Ended September 30,
	2011	2010	2011	2010
Denominator for basic EPS – weighted average shares	41.7	41.3	41.6	41.2
Effect of dilutive securities:
Employee/director stock options and restricted stock units	0.4	0.2	0.4	0.2
Denominator for diluted EPS – weighted average shares	42.1	41.5	42.0	41.4