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Earnings per Share ("EPS")
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Earnings per Share (EPS) Earnings per Share ("EPS")
The Company's restricted stock units ("RSUs") are paid non-forfeitable common stock dividends and thus meet the criteria of participating securities. Accordingly, basic EPS has been calculated using the two-class method, under which earnings are allocated to both common stock and participating securities. Basic EPS has been computed by dividing net income allocated to common stock by the weighted average common shares outstanding. For the computation of basic EPS, weighted average RSUs outstanding are excluded from the calculation of weighted average shares outstanding.
ASC Topic 260, Earnings per Share ("ASC Topic 260") requires companies with participating securities to calculate diluted earnings per share using the "two class" method. The "two class" method requires first calculating diluted earnings per share using a denominator that includes the weighted average share equivalents from the assumed conversion of dilutive securities. Diluted earnings per share is then calculated using net income reduced by the amount of distributed and undistributed earnings allocated to participating securities calculated using the "Treasury Stock" method and a denominator that includes the weighted average share equivalents from the assumed conversion of dilutive securities excluding participating securities. Companies are required to report the lower of the diluted earnings per share amounts under the two calculations subject to the anti-dilution provisions of ASC Topic 260.
Diluted EPS has been computed by dividing net income allocated to common stock by the weighted average number of common shares used in computing basic EPS, further adjusted to include the dilutive impact of the exercise or conversion of common stock equivalents, such as stock options, stock appreciation rights ("SARs") and target awards of RSUs with performance conditions ("Performance Share Units" or "PSUs"), into shares of common stock as if those securities were exercised or converted. For the years ended December 31, 2019, 2018 and 2017, approximately 231,000, 143,000 and 72,000 potentially dilutive options, respectively, were excluded from the computation of dilutive common shares because
the exercise price of such options exceeded the average market price of the Company's common stock for the respective 12-month periods during which the options were outstanding.
The following table presents the computation of basic and diluted shares of common stock used in the calculation of EPS (amounts in millions, except share and per share amounts):
Earnings per basic common share
 
 
Year Ended December 31,
 
 
2019
 
2018
 
2017
Income from continuing operations
 
$
55.4

 
$
37.2

 
$
80.3

Amounts attributable to participating securities
 
(0.3
)
 
(0.2
)
 
(0.6
)
Income from continuing operations available to common stockholders
 
55.1

 
37.0

 
79.7

Loss from discontinued operations, net of income taxes
 
—

 
(0.8
)
 
—

Amounts attributable to participating securities
 
—

 
—

 
—

Net income available to common stockholders
 
$
55.1

 
$
36.2

 
$
79.7

Weighted-average basic shares outstanding
 
16,848

 
16,850

 
16,805

Basic earnings (loss) per share
 
 

 
 

 
 

Continuing operations
 
$
3.27

 
$
2.20

 
$
4.74

Discontinued operations
 
—

 
(0.05
)
 
—

 
 
$
3.27

 
$
2.15

 
$
4.74


Earnings per diluted common share
 
 
Year Ended December 31,
 
 
2019
 
2018
 
2017
Income from continuing operations
 
$
55.4

 
$
37.2

 
$
80.3

Amounts attributable to participating securities
 
(0.3
)
 
(0.4
)
 
(0.5
)
Income from continuing operations available to common stockholders
 
55.1

 
36.8

 
79.8

Loss from discontinued operations, net of income taxes
 
—

 
(0.8
)
 
—

Amounts attributable to participating securities
 
—

 
—

 
—

Net income available to common stockholders
 
$
55.1

 
$
36.0

 
$
79.8

Weighted-average basic shares outstanding
 
16,848

 
16,850

 
16,805

Add: Assumed incremental shares under stock-based compensation plans
 
58

 
118

 
247

Weighted average diluted shares
 
16,906

 
16,968

 
17,052

Diluted earnings (loss) per share
 
 

 
 

 
 

Continuing operations
 
$
3.26

 
$
2.17

 
$
4.68

Discontinued operations
 
—

 
(0.05
)
 
—

 
 
$
3.26

 
$
2.12

 
$
4.68