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Earnings per Share (Tables)
 6 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]
Basic EPS has been computed by dividing net income by the weighted-average number of common shares outstanding.
The following is a reconciliation of the numerator and denominator of the diluted net income per share computations for the periods presented below.
 
Three Months Ended March 31,
 
Six Months Ended March 31,
(in millions, except share amounts)
2015
 
2014
 
2015
 
2014
Numerator:
 
 
 
 
 
 
 
Income from continuing operations
$
13.0

 
$
7.7

 
$
22.4

 
$
10.1

Less: Allocation to participating securities
(0.3
)
 
(0.2
)
 
(0.5
)
 
(0.3
)
Income from continuing operations allocated to common stockholders
$
12.7

 
$
7.5

 
$
21.9

 
$
9.8

(Loss) income from discontinued operations
$
—

 
$
(0.2
)
 
$
—

 
$
(0.1
)
Less: Allocation to participating securities
—

 
—

 
—

 
—

(Loss) income from discontinued operations allocated to common stockholders
$
—

 
$
(0.2
)
 
$
—

 
$
(0.1
)
Diluted net income
$
13.0

 
$
7.5

 
$
22.4

 
$
10.0

Less: Allocation to participating securities
(0.3
)
 
(0.2
)
 
(0.5
)
 
(0.3
)
Diluted net income allocated to common stockholders
$
12.7

 
$
7.3

 
$
21.9

 
$
9.7

Denominator:
 
 
 
 
 
 
 
Weighted average number of:
 
 
 
 
 
 
 
Common shares outstanding
18,599,011


18,609,550

 
18,546,377

 
18,627,383

Dilutive potential common shares outstanding:
 
 
 
 

 

Share-based awards
358,769

 
345,578

 
196,656

 
646,770

Diluted weighted-average shares
18,957,780

 
18,955,128

 
18,743,033

 
19,274,153