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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2015
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, 2015.
 
Number
of
Shares
(in 000’s)
 
Weighted-
Average
Exercise
Price
 
 
 
 
Outstanding at December 31, 2014
453

 
$
28.85

 
 
 
 
Granted
609

 
$
51.48

Forfeited
(19
)
 
$
48.32

Exercised
(123
)
 
$
29.01

 
 
 
 
Outstanding at December 31, 2015
920

 
$
43.47

Exercisable at December 31, 2015
219

 
$
26.00

SARs expected to vest
701

 
$
48.92
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, 2015, 2014 and 2013.
 
2015
 
2014
 
2013
Grant date fair value of SARs
$
11.37

 
$
13.40

 
$
9.77

Expected stock price volatility
25.96
%
 
34.85
%
 
35.88
%
Risk-free interest rate
1.49
%
 
1.53
%
 
1.04
%
Expected annual dividend yield
1.55
%
 
1.80
%
 
1.79
%
Expected life of options & SARs (years)
5.7

 
6.4

 
6.3
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, 2015.  
 
Number
of
Shares
(in 000’s)
 
Weighted-
Average
Grant-Date
Fair Value
 
 
 
 
Outstanding at December 31, 2014
322

 
$
33.14

 
 
 
 
Granted
226

 
$
45.75

Vested
(138
)
 
$
32.04

Forfeited
(57
)
 
$
35.63

 
 
 
 
Outstanding at December 31, 2015
353

 
$
41.23