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RETIREMENT BENEFITS (Tables)
6 Months Ended
Nov. 29, 2011
RETIREMENT BENEFITS [Abstract]  
Defined Benefit Plan Disclosure
The following tables detail the components of net periodic benefit costs and the amounts recognized in our Condensed Consolidated Financial Statements for the Retirement Plan, Management Retirement Plan, and the Executive Supplemental Pension Plan (collectively, the “Pension Plans”) and the Postretirement Medical and Life Benefits plans (in thousands):

 
Pension Benefits
 
 
Thirteen weeks ended
 
Twenty-six weeks ended
 
 
November 29,
 
November 30,
 
November 29,
 
November 30,
 
 
2011
 
2010
 
2011
 
2010
 
Service cost
$
134
 
$
129
 
$
268
 
$
258
 
Interest cost
 
576
   
573
   
1,152
   
1,146
 
Expected return on plan assets
 
(126
)
 
(98
)
 
(252
)
 
(196
)
Amortization of prior service cost
 
64
   
82
   
128
   
164
 
Recognized actuarial loss
 
426
   
398
   
852
   
796
 
Net periodic benefit cost
$
1,074
 
$
1,084
 
$
2,148
 
$
2,168
 
     
 
Postretirement Medical and Life Benefits
 
 
Thirteen weeks ended
 
Twenty-six weeks ended
 
 
November 29,
 
November 30,
 
November 29,
 
November 30,
 
 
2011
 
2010
 
2011
 
2010
 
Service cost
$
2
 
$
2
 
$
4
 
$
4
 
Interest cost
 
18
   
19
   
36
   
38
 
Amortization of prior service cost
 
(14
)
 
(15
)
 
(28
)
 
(30
)
Recognized actuarial loss
 
34
   
28
   
68
   
56
 
Net periodic benefit cost
$
40
 
$
34
 
$
80
 
$
68