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Equity Incentive Program (Tables)
 9 Months Ended
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock-based incentive plans compensation expense
Stock-based compensation is reported within Selling, general and administrative expenses in the accompanying Condensed Consolidated Statements of Earnings. The following table summarizes the Company’s compensation expense relating to all stock-based incentive plans:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
Pre-tax stock-based compensation expense
$
4,341

 
$
3,431

 
$
21,810

 
$
17,791

Tax benefit
(1,436
)
 
(1,192
)
 
(7,623
)
 
(6,272
)
Total stock-based compensation expense, net of tax
$
2,905

 
$
2,239

 
$
14,187

 
$
11,519



On January 1, 2017, the Company adopted ASU 2016-09, Compensation: Stock Compensation (Topic 718). See Note 18 — Recent Accounting Pronouncements for further details.
Stock Appreciation Rights (SARs) [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Valuation assumptions
 
SARs
 
2017
 
2016
Risk-free interest rate
1.80
%
 
1.05
%
Dividend yield
2.27
%
 
3.09
%
Expected life (years)
4.6

 
4.6

Volatility
21.90
%
 
26.17
%
 
 
 
 
Grant price
$
79.28

 
$
57.25

Fair value per share at date of grant
$
12.63

 
$
9.25
Performance Shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Valuation assumptions
 
Performance shares
 
2017
 
2016
Fair value per share at date of grant
$
79.28

 
$
57.25

Average attainment rate reflected in expense
139.95
%
 
11.99
%