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Stock-Based Compensation
 9 Months Ended
Sep. 30, 2012
Share-based Compensation [Abstract]  
Stock-Based Compensation
Stock-Based Compensation
The Company has certain stock-based compensation plans that have stock options and restricted share awards outstanding as of September 30, 2012. Under plans currently in effect, there were a total of 4,151,282 shares available for grant as of September 30, 2012. Details of total stock-based compensation expense and related tax benefits for the periods indicated were as follows (in millions):
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2012
 
2011
 
2012
 
2011
Stock based compensation expense:
 
 
 
 
 
 
 
Restricted share awards
$
1.2

 
$
1.0

 
$
3.4

 
$
2.8

Stock options
—

 
—

 
—

 
—

 Total stock based compensation expense
$
1.2

 
$
1.0

 
$
3.4

 
$
2.8

Income tax benefit from stock based compensation:
 
 
 
 
 
 
 
   Restricted share awards
$
0.6

 
$
0.4

 
$
1.4

 
$
2.1

Stock options
0.1

 
0.5

 
0.2

 
2.9

  Total income tax benefit from stock based compensation
$
0.7

 
$
0.9

 
$
1.6

 
$
5.0

Excess tax benefit from stock based compensation:
 
 
 
 
 
 
 
Vested restricted shares (1)
$
0.1

 
$
—

 
$
0.1

 
$
1.0

 Stock options exercised (1)
0.1

 
0.5

 
0.2

 
2.9

  Total excess tax benefit from stock based compensation
$
0.2

 
$
0.5

 
$
0.3

 
$
3.9

(1)
Excess tax benefits, which represent cash flows from tax deductions in excess of compensation expense recognized for stock options exercised and vested restricted shares, are classified as financing cash flows in the Company’s condensed unaudited consolidated statements of cash flows.

During the three and nine month periods ended September 30, 2012, the Company granted 5,286 and 175,290 restricted share awards, respectively. Total unearned compensation related to restricted share awards as of September 30, 2012 was $6.3 million, which is expected to be recognized over a weighted average period of approximately 2 years. The intrinsic value of options exercised during the three and nine month periods ended September 30, 2012 was $0.4 million and $0.7 million, respectively. Proceeds received from options exercised during the three and nine month periods ended September 30, 2012 totaled $0.3 million and $0.6 million, respectively.