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Earnings Per Share
 9 Months Ended
Sep. 30, 2014
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
The calculation of basic earnings per share is based on the weighted average number of shares of the Company's common stock outstanding during the period. Diluted earnings per share is similar to basic earnings per share, but adjusts for the dilutive effect of the potential issuance of incremental shares of the Company's common stock. The following is a reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per share available to common stockholders.
 
For the Three Months Ended September 30,
 
For the Nine Months Ended September 30,
 
2013
 
2014
 
2013
 
2014
Numerator
 
 
 
 
 
 
 
Net income (controlling interest)
$
75.2

 
$
104.3

 
$
202.3

 
$
281.5

Convertible securities interest expense, net
2.6

 
3.8

 
—

 
—

Net income (controlling interest), as adjusted
$
77.8

 
$
108.1

 
$
202.3

 
$
281.5

Denominator
 
 
 
 
 
 
 
Average shares outstanding—basic
53.2

 
55.6

 
53.0

 
54.9

Effect of dilutive instruments:
 
 
 
 
 
 
 
Contingently convertible securities
2.0

 
2.1

 
—

 
—

Stock options and restricted stock
1.3

 
1.1

 
1.4

 
1.1

Forward equity
0.4

 
—

 
0.3

 
0.1

Average shares outstanding—diluted
56.9

 
58.8

 
54.7

 
56.1


For the three months ended September 30, 2014, the Company repurchased approximately 0.3 million shares of common stock at an average price per share of $206.81 under the share repurchase programs approved by the Company's Board of Directors.
The diluted earnings per share calculations in the table above exclude the anti-dilutive effect of the following shares:
 
For the Three Months Ended September 30,
 
For the Nine Months Ended September 30,
 
2013
 
2014
 
2013
 
2014
Stock options and restricted stock
0.0

 
0.2

 
0.0

 
0.2

Senior convertible securities
1.3

 
—

 
2.9

 
—

Junior convertible securities
2.2

 
—

 
4.2

 
2.6