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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2014
Income Taxes [Abstract]  
Income from operations before provision for taxes by domestic and foreign source
Income from operations before provision for taxes by domestic and foreign source is as follows:

  
2014
  
2013
  
2012
 
  
(millions of dollars)
 
Income from continuing operations before income taxes and income from affiliates and joint ventures:
         
Domestic
 
$
54.8
  
$
66.6
  
$
56.9
 
Foreign
  
68.2
   
57.1
   
53.7
 
  
$
123.0
  
$
123.7
  
$
110.6
 
Provision (benefit) for taxes on income
The provision (benefit) for taxes on income consists of the following:

  
2014
  
2013
  
2012
 
  
(millions of dollars)
 
Domestic
      
Taxes currently payable
      
Federal
 
$
28.1
  
$
13.7
  
$
14.9
 
State and local
  
3.4
   
2.6
   
1.3
 
Deferred income taxes
  
(15.1
)
  
2.5
   
3.2
 
Domestic tax provision
  
16.4
   
18.8
   
19.4
 
             
Foreign
            
Taxes currently payable
  
20.3
   
13.8
   
14.3
 
Deferred income taxes
  
(5.9
)
  
1.9
   
(1.8
)
Foreign tax provision
  
14.4
   
15.7
   
12.5
 
Total tax provision
 
$
30.8
  
$
34.5
  
$
31.9
 
Reconciliation of statutory federal tax rate to effective federal tax rate
The major elements contributing to the difference between the U.S. federal statutory tax rate and the consolidated effective tax rate are as follows:

  
2014
  
2013
  
2012
 
       
U.S. statutory rate
  
35.0
%
  
35.0
%
  
35.0
%
             
Depletion
  
-7.8
%
  
-3.6
%
  
-3.8
%
Difference between tax provided on foreign earnings and the U.S. statutory rate
  
-9.5
%
  
-3.6
%
  
-4.0
%
State and local taxes, net of federal tax benefit
  
1.0
%
  
1.7
%
  
1.5
%
Tax credits and foreign dividends
  
4.1
%
  
-1.7
%
  
-0.1
%
Change in valuation allowance
  
1.7
%
  
0.3
%
  
-1.1
%
Impact of uncertain tax positions
  
0.4
%
  
-0.6
%
  
0.9
%
Impact of officer's non-deductible compensation
  
2.7
%
  
2.3
%
  
2.1
%
Manufacturing deduction
  
-3.3
%
  
-0.9
%
  
-0.8
%
Other
  
0.7
%
  
-1.0
%
  
-0.9
%
Consolidated effective tax rate
  
25.0
%
  
27.9
%
  
28.8
%
Deferred tax assets and liabilities
The Company believes that its accrued liabilities are sufficient to cover its U.S. and foreign tax contingencies.  The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are presented below:

  
2014
  
2013
 
  
(millions of dollars)
 
Deferred tax assets attributable to:
    
Accrued liabilities
 
$
39.9
  
$
9.4
 
Net operating loss carry forwards
  
25.6
   
9.6
 
Pension and post-retirement benefits costs
  
57.1
   
21.6
 
Other
  
18.9
   
14.3
 
Valuation allowance
  
(21.7
)
  
(5.9
)
Total deferred tax assets
  
119.8
   
49.0
 
Deferred tax liabilities attributable to:
        
Plant and equipment, principally due to differences in depreciation
  
264.3
   
14.3
 
Intangible assets
  
89.3
   
13.3
 
Other
  
5.4
   
1.6
 
Total deferred tax liabilities
  
359.0
   
29.2
 
Net deferred tax asset (liability)
 
$
(239.2
)
 
$
19.8
 
 
The current and long-term portion of net deferred tax assets is as follows:

  
2014
  
2013
 
  
(millions of dollars)
 
       
Net deferred tax asset (liability), current
 
$
19.6
  
$
4.0
 
Net deferred tax asset (liability), long-term
  
(258.8
)
  
15.8
 
  
$
(239.2
)
 
$
19.8
 
Activity related to unrecognized tax benefits
The following table summarizes the activity related to our unrecognized tax benefits:

  
2014
  
2013
 
  
(millions of dollars)
 
     
Balance at beginning of the year
 
$
3.9
  
$
4.8
 
Increases related to current year tax positions
  
0.6
   
0.6
 
Increases related to new judgements
  
1.0
   
-
 
Decreases related to audit settlements and statue expirations
  
(0.5
)
  
(1.5
)
Balance at the end of the year
 
$
5.0
  
$
3.9