Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Calculation of basic and diluted earnings per share

Basic and diluted earnings per share were calculated as follows, for each period presented:

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Numerator:
Net income	$	25.4	$	29.2	$	77.5	$	76.7
Denominator — Weighted-average common shares outstanding (in thousands)1:
Basic	18,548		19,154		18,915		19,104
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares	165		134		167		136
Add: dilutive effect of warrants	345		—		185		—
Diluted	19,058		19,288		19,267		19,240
Earnings per common share, Basic:
Net income per share	$	1.37	$	1.52	$	4.09	$	4.01
Earnings per common share, Diluted:
Net income per share	$	1.34	$	1.51	$	4.02	$	3.98

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¹  The basic weighted-average number of common shares outstanding during the period excludes non-vested common shares, restricted stock units and performance shares. The diluted weighted-average number of common shares outstanding during the period is calculated using the treasury method.