Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

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

(3) Earnings Per Share ("EPS"): The number of shares used to compute basic and diluted earnings per share is as follows (in millions):

	Quarter Ended
	March 31,
	2012		2011
Denominator for basic EPS - weighted average shares		41.9		41.5
Effect of dilutive securities:
Employee/director stock options, non-vested common stock, and restricted stock units		0.4		0.3
Denominator for diluted EPS - weighted average shares		42.3		41.8