Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Calculation of basic and diluted earnings per share

Basic and diluted earnings per share for 2013, 2012 and 2011 were calculated as follows:

	Year Ended December 31,
	2013		2012		2011
Numerator:
Net income	$	104.8	$	85.8	$	25.1
Denominator - Weighted-average common shares outstanding (in thousands):
Basic1	18,827		19,115		18,979
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares	178		163		—
Add: dilutive effect of warrants	241		—		—
Diluted2	19,246		19,278		18,979
Earnings per common share, Basic:
Net income per share	$	5.56	$	4.49	$	1.32
Earnings per common share, Diluted:
Net income per share2	$	5.44	$	4.45	$	1.32

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¹  The basic weighted-average number of common shares outstanding during the period excludes unvested share-based incentive awards.

²  The diluted weighted-average number of common shares outstanding and diluted earnings per share for 2013 and 2012 were calculated using the treasury method. The diluted weighted-average number of common shares outstanding and diluted earnings per share for 2011 were calculated using the two-class method (see Note 1).