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Stock Compensation Plans (Tables)
3 Months Ended
Mar. 31, 2014
Share-based Compensation [Abstract]  
Stock Compensation Expense
The Company recorded stock compensation expense as follows for the three months ended March 31, 2014 and 2013 (in millions):
 
 
Three Months Ended March 31,
 
 
2014
 
2013
Cost of goods sold
 
$
0.5

 
$
0.6

Selling, general and administrative expenses
 
5.9

 
7.9

Total stock compensation expense
 
$
6.4

 
$
8.5

Performance Award Transactions
Performance award transactions during the three months ended March 31, 2014 were as follows and are presented as if the Company were to achieve its maximum levels of performance under the plan:
Shares awarded but not earned at January 1
2,808,519

Shares awarded
864,600

Shares forfeited or unearned
(67,296
)
Shares earned

Shares awarded but not earned at March 31
3,605,823

Weighted Average Grant-Date Fair Value of SSARs and Assumptions Under Black-Scholes Option Model
The weighted average grant-date fair value of SSARs granted under the 2006 Plan and the weighted average assumptions under the Black-Scholes option model were as follows for the three months ended March 31, 2014 and 2013:
 
Three Months Ended March 31,
 
2014
 
2013
Weighted average grant-date fair value
$
13.13

 
$
22.22

Weighted average assumptions under Black-Scholes option model:
 

 
 

Expected life of awards (years)
3.0

 
5.5

Risk-free interest rate
0.9
%
 
0.8
%
Expected volatility
35.7
%
 
50.6
%
Expected dividend yield
0.8
%
 
0.8
%
SSAR Activity
SSAR transactions during the three months ended March 31, 2014 were as follows:
SSARs outstanding at January 1
1,094,836

SSARs granted
297,900

SSARs exercised
(5,575
)
SSARs canceled or forfeited
(20,181
)
SSARs outstanding at March 31
1,366,980

SSAR price ranges per share:
 

Granted
$
55.23

Exercised
21.45-52.94

Canceled or forfeited
21.45-56.98

Weighted average SSAR exercise prices per share:
 

Granted
$
55.23

Exercised
35.06

Canceled or forfeited
52.51

Outstanding at March 31
48.24

Schedule Of SSAR Exercise Price Range, Number Of Shares, Weighted Average Exercise Price and Remaining Contractual Lives
The following table sets forth the exercise price range, number of shares, weighted average exercise price, and remaining contractual life by groups of similar price as of March 31, 2014:
 
 
SSARs Outstanding
 
SSARs Exercisable
Range of Exercise Prices
 
Number of
Shares
 
Weighted Average
Remaining
Contractual Life
(Years)
 
Weighted Average
Exercise Price
 
Number of Shares
 
Weighted Average
Exercise Price
$ 21.45 – $32.01
 
157,625

 
1.9
 
$
21.88

 
155,500

 
$
21.74

$ 33.65 – $43.39
 
128,900

 
2.9
 
$
33.87

 
127,450

 
$
33.76

$ 47.89 – $63.64
 
1,080,455

 
5.3
 
$
53.80

 
381,050

 
$
53.41

 
 
1,366,980

 
 
 
 
 
664,000

 
$
42.22