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Associate (Employee) Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2014
Compensation And Retirement Disclosure [Abstract]  
Schedule of Net Periodic Benefit Cost Components of Postretirement Benefits

The following disclosures of the net periodic benefit cost components of postretirement benefits were measured at January 1, 2014 and 2013:

 

     Three months ended
June 30,		      Six months ended
June 30,		  
     2014     2013      2014     2013  
(In Thousands)                          

Service cost

    $ 10     $ 86      $ 98     $ 172  

Interest cost

      42       44        98       88  

Prior service cost amortization

      (30 )      —          (30 )      —    

Net loss recognition

      30        20        44       40  
  

 

 

    

 

 

     

 

 

    

 

 

  

Net periodic benefit cost

    $ 52     $ 150      $ 210     $ 300