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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2013
Employee Benefit Plans [Abstract]  
Pension obligations and funded status
The following tables set forth our pension obligations and funded status at December 31:

     
Pension Benefits
 
     
Defined Benefit Pension Plan
     
Supplementary Pension Plan
 
     
 
2013
  
2012
  
2013
  
2012
 
Change in benefit obligations:
 
  
  
  
 
Beginning projected benefit obligation
 
$
63.8
  
$
58.1
  
$
13.2
  
$
11.6
 
Service cost
  
1.7
   
1.7
   
0.4
   
0.3
 
Interest cost
  
2.6
   
2.7
   
0.5
   
0.5
 
Actuarial (gain)/loss
  
(6.8
)
  
2.6
   
(1.6
)
  
1.2
 
Benefits paid
  
(1.4
)
  
(1.3
)
  
(0.4
)
  
(0.4
)
Ending projected benefit obligation
  
59.9
   
63.8
   
12.1
   
13.2
 
 
                
Change in plan assets:
                
Beginning fair value
  
39.1
   
34.5
   
-
   
-
 
Actual return
  
6.2
   
4.3
         
Company contribution
  
1.2
   
1.7
   
0.4
   
0.4
 
Benefits paid
  
(1.4
)
  
(1.4
)
  
(0.4
)
  
(0.4
)
Ending fair value
  
45.1
   
39.1
   
-
   
-
 
 
                
Funded status of the plan
  
(14.8
)
  
(24.7
)
  
(12.1
)
  
(13.2
)
   
                                  

Summary of net periodic pension cost
Pension cost in each of the following years was comprised of:

      
 
Defined Benefit Pension Plan
   
Supplementary Pension Plan
 
      
 
2013
  
2012
  
2011
  
2013
  
2012
  
2011
 
Service cost – benefits earned during the year
 
$
1.7
  
$
1.7
  
$
1.5
  
$
0.4
  
$
0.3
  
$
0.2
 
Interest cost on accumulated benefit obligation
  
2.6
   
2.7
   
2.6
   
0.5
   
0.5
   
0.5
 
Expected return on plan assets
  
(2.9
)
  
(2.6
)
  
(2.9
)
  
-
   
-
   
-
 
Net amortization and deferral
  
1.0
   
1.0
   
0.1
   
0.3
   
0.2
   
0.1
 
Net periodic pension cost
  
2.4
   
2.8
   
1.3
   
1.2
   
1.0
   
0.8
 
                                
Assumptions used to determine pension obligations
The following table summarizes the assumptions used in determining our pension obligations at the end of each of our last two years:

  
Defined Benefit Pension Plan
     
Supplementary Pension Plan
 
   
2013
  
2012
  
2013
 
2012
 
Discount rate
  
5.00
%
  
4.17
%
  
4.85
%
  
4.00
%
Rate of compensation increase
  
3.00
%
  
3.00
%
  
3.00
%
  
3.00
%
Long-term rate of return on plan assets
  
7.50
%
  
7.50
%
  
N/A
 
  
N/A
 
                        
Assumptions used to determine net periodic benefit cost
The following table summarizes the assumptions used in determining our pension obligations at the end of each of our last two years:

  
Defined Benefit Pension Plan
     
Supplementary Pension Plan
 
   
2013
  
2012
  
2013
 
2012
 
Discount rate
  
5.00
%
  
4.17
%
  
4.85
%
  
4.00
%
Rate of compensation increase
  
3.00
%
  
3.00
%
  
3.00
%
  
3.00
%
Long-term rate of return on plan assets
  
7.50
%
  
7.50
%
  
N/A
 
  
N/A
 
                        

 The following table summarizes the assumptions used in determining our net periodic benefit cost in the years ended December 31:

  
  
Defined Benefit Pension Plan
   
Supplementary Pension Plan
 
    
 
2013
  
2012
  
2011
  
2013
  
2012
  
2011
 
Discount rate
  
4.17
%
  
4.70
%
  
5.51
%
  
4.00
%
  
4.63
%
  
5.36
%
Rate of compensation increase
  
3.00
%
  
4.00
%
  
4.00
%
  
3.00
%
  
4.00
%
  
4.00
%
Long-term rate of return on plan assets
  
7.50
%
  
7.50
%
  
8.00
%
  
N/A
 
  
N/A
 
  
N/A
 
                                                   
Expected payment of future benefits
The estimated future benefit payments contemplated under these plans, reflecting expected future service, as appropriate, are presented in the following table:

     
 
Defined Benefit Pension Plan
  
Supplementary Pension Plan
 
 
  
 
2014
 
$
1.9
  
$
0.4
 
2015
  
2.1
   
0.4
 
2016
  
2.4
   
0.5
 
2017
  
2.6
   
0.7
 
2018
  
2.8
   
0.8
 
2018 through 2022
  
18.1
   
4.0
 
             
Amounts recognized in other comprehensive income and prior service cost
Note 4 shows the amounts included within accumulated other comprehensive income as of December 31, 2013 and 2012 that have not yet been recognized as components of net periodic benefit cost.  Of these balances at December 31, 2013, the amounts expected to be amortized in the next fiscal year are $0.1 and $0.2 for the unrecognized prior service cost and unrecognized net actuarial loss, respectively.  Excluding the effect of income taxes, the amounts recognized within other comprehensive income and the prior service cost for 2013 and 2012, are as follows:
 
          
 
2013
  
2012
 
Recognized in Other Comprehensive Income:
 
  
 
Net actuarial loss (gain)
 
$
(11.8
)
 
$
2.1
 
Amortization of net actuarial loss (gain)
  
(1.2
)
  
(1.1
)
Amortization of prior service cost (credit)
  
-
   
(0.1
)
 
        
Total change in other comprehensive income
  
(13.0
)
  
0.9
 
     
               

Fair value of pension plan assets
Fair values of our defined benefit pension plan assets at December 31, by asset category, are as follows:

     
 
Fair Value Measurements as of December 31, 2013
 
     
 
  
Quoted Prices
in Active
Markets for
 Identical Assets
  
Significant Observable Inputs
  
Significant Unobservable Inputs
 
    
 
Total
  
Level 1
  
Level 2
  
Level 3
 
Short term investment funds
 
$
0.1
  
$
-
  
$
0.1
  
$
-
 
Equity securities:
                
US equity securities
  
17.3
   
7.4
   
9.9
   
-
 
International equity securities
  
12.3
   
4.4
   
7.9
   
-
 
AMCOL International common stock
  
2.4
   
2.4
   
-
   
-
 
Fixed income securities and bonds
                
Governmental agencies
  
0.8
   
-
   
0.8
   
-
 
Corporate bonds
  
6.8
   
6.8
   
-
   
-
 
Other investments
                
Real estate index funds
  
0.8
   
-
   
0.8
   
-
 
Hedge funds
  
4.6
   
-
   
-
   
4.6
 
Total
  
45.1
   
21.0
   
19.5
   
4.6
 
                         

 
      
 
Fair Value Measurements as of December 31, 2012
 
      
 
  
Quoted Prices
in Active
Markets for
Identical Assets
  
Significant Observable Inputs
  
Significant Unobservable Inputs
 
 
 
Total
  
Level 1
  
Level 2
  
Level 3
 
Short term investment funds
 
$
0.6
  
$
-
  
$
0.6
  
$
-
 
Equity securities:
                
US equity securities
  
14.0
   
1.4
   
12.6
   
-
 
International equity securities
  
9.5
   
4.5
   
5.0
   
-
 
AMCOL International common stock
  
2.1
   
2.1
   
-
   
-
 
Fixed income securities and bonds
                
Governmental agencies
  
0.7
   
-
   
0.7
   
-
 
Corporate bonds
  
5.4
   
5.4
   
-
   
-
 
Guaranteed investment contracts
  
1.3
   
-
   
1.3
   
-
 
Other investments
                
Real estate index funds
  
0.8
   
-
   
0.8
   
-
 
Commodities linked funds
  
0.7
   
0.7
   
-
   
-
 
Hedge funds
  
4.0
   
-
   
-
   
4.0
 
Total
  
39.1
   
14.1
   
21.0
   
4.0
 
 
                                 
Reconciliation of changes in fair value measurements of plan assets
The following is a reconciliation of changes in fair value measurements of plan assets using significant unobservable inputs (Level 3):

  
 
Hedge Funds
 
Beginning balance at December 31, 2011
 
$
3.9
 
Purchases, sales, and settlements
  
-
 
Actual return on plan assets still held at reporting date
  
0.1
 
Ending balance at December 31, 2012
  
4.0
 
Purchases, sales, and settlements
  
-
 
Actual return on plan assets still held at reporting date
  
0.6
 
Ending balance at December 31, 2013
  
4.6