Earnings Per Share

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Earnings Per Share

20.   Earnings Per Share:

Basic earnings per share are computed by dividing net income by the weighted-average number of common shares outstanding during the period. Diluted earnings per share are computed by dividing net income by the sum of the weighted-average number of shares and the number of equivalent shares assumed outstanding, if dilutive, under our stock-based compensation plans.

The computations of basic and diluted earnings per share for Income from Continuing Operations were as follows (in millions, except per share data):

	For the Years Ended December 31,
	2011		2010		2009
Net income	$	88.3	$	116.2	$	51.1
Add: Loss from discontinued operations		—		0.9		10.7
Income from continuing operations	$	88.3	$	117.1	$	61.8
Weighted-average shares outstanding — basic		52.5		54.6		55.6
Effect of dilutive securities		0.9		1.2		1.0
Weighted-average shares outstanding — diluted		53.4		55.8		56.6
Earnings per share from continuing operations:
Basic	$	1.68	$	2.14	$	1.11
Diluted	$	1.65	$	2.10	$	1.09

Stock appreciation rights were outstanding, but not included in the diluted earnings per share calculation because the assumed exercise of such rights would have been anti-dilutive. The details are as follows:

	For the Years Ended December 31,
	2011		2010		2009
Stock appreciation rights (number of shares)		1,466,149		273,429		—
Price ranges per share	$	34.06 –46.78	$	46.78	$	N/A