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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2014
Market Volatility Assumptions
   

Market volatility assumption varies by fund type and grades from a current volatility number to a long-term assumption over one year as shown below:

 

     2014  

Fund index type

   Current
  volatility  
    Long-term
forward
volatility
 

Large cap

     16.6     18.2

Bond

     3.4        3.9   

International

     16.3        23.7   

Small cap

     21.3        21.2   

 

     2013  

Fund index type

   Current
  volatility  
    Long-term
forward
volatility
 

Large cap

     15.8     18.2

Bond

     3.4        4.0   

International

     17.0        24.5   

Small cap

     19.8        21.1