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Employee Benefit Plans (Details 4)
Dec. 31, 2013
Dec. 31, 2012
Pension Benefits [Member]
   
Assumptions used to determine of end of year benefit obligations    
Discount rate 4.64% 3.70%
Postretirement Benefits [Member]
   
Assumptions used to determine of end of year benefit obligations    
Discount rate 4.39% 3.67%