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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of stock option and SAR activity
The following table illustrates the stock option and SAR activity for the year ended December 31, 2012.
 
Number
of
Shares
(in 000’s)
 
Weighted-
Average
Exercise
Price
 
 
 
 
Outstanding at December 31, 2011
2,129

 
$
24.58

 
 
 
 
Granted
159

 
$
26.09

Forfeited
(31
)
 
$
23.20

Exercised
(488
)
 
$
22.22

 
 
 
 
Outstanding at December 31, 2012
1,769

 
$
25.35

Exercisable at December 31, 2012
1,289

 
$
25.97
Stock Options and Stock Appreciation Rights (SARs) [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Valuation Assumptions
The following table illustrates the assumptions used in estimating fair value in the years ended December 31, 2010, 2011 and 2012.
 
2010
 
2011
 
2012
Fair value of options & SARs
$
7.72

 
$
10.43

 
$
7.38

Expected stock price volatility
36.72
%
 
35.52
%
 
35.84
%
Risk-free interest rate
2.07
%
 
1.59
%
 
0.62
%
Expected annual dividend yield
—
%
 
—
%
 
2.00
%
Expected life of options (years)
6.4

 
6.3

 
6.4
Restricted Stock Units (RSUs) and Performance Share Units (PSUs) [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of RSU and PSU activity
The following table illustrates the RSU and PSU activity for the year ended December 31, 2012.  

 
Number
of
Shares
(in 000’s)
 
Weighted-
Average
Grant-Date
Fair Value
 
 
 
 
Outstanding at December 31, 2011
508

 
$
23.43

 
 
 
 
Granted
272

 
$
26.18

Vested
(158
)
 
$
24.03

Forfeited
(101
)
 
$
25.83

 
 
 
 
Outstanding at December 31, 2012
521

 
$
24.25