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Defined Pension Plans (Tables)
3 Months Ended
Mar. 31, 2014
Defined Pension Plans [Abstract]  
Schedule of Net Periodic Pension Costs

The following table represents the components of the net periodic pension costs:

  Estimated       Actual
(In thousands) 2014   2013
Service cost - benefits earned during the year $       3,073     $       3,452  
Interest cost on projected benefit obligations   3,132       2,819  
Expected return on plan assets   (4,958 )     (4,469 )
Net amortization and deferral   393       1,729  
       Net periodic pension cost $ 1,640     $ 3,531  
Schedule of Unfunded Supplemental Executive Retirement Plan

The following table represents the components of the net periodic pension costs for 2013 and an estimate for 2014:

  Estimated   Actual
(In thousands) 2014       2013
Service cost - benefits earned during the year $       136   $       144
Interest cost on projected benefit obligation   377     335
Net amortization   431     551
       Net periodic pension cost $ 944   $ 1,030