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Qualified Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2012
Qualified Employee Benefit Plans [Abstract]  
Net expense (benefit) under the Retirement Plan
Net expense (benefit) under the Retirement Plan consisted of:

   
Three Months Ended
September 30,
  
Nine Months Ended
September 30,
 
   
2012
  
2011
  
2012
  
2011
 
   
(in thousands)
 
              
Interest cost on projected benefit obligations
 $1,139  $1,133  $3,493  $3,493 
Expected return on plan assets
  (1,231 )  (1,272 )  (3,737 )  (3,860 )
Recognized actuarial loss
  208   92   642   308 
Amortization of transition asset
  (36 )  (36 )  (108 )  (108 )
Net pension expense (benefit)
 $80  $(83) $290  $(167)