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EMPLOYEE POST-EMPLOYMENT BENEFITS (Tables)
3 Months Ended
Sep. 04, 2012
EMPLOYEE POST-EMPLOYMENT 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
 
September 4, 2012
 
August 30, 2011
Service cost
 
$
115
 
 
$
134
 
Interest cost
 
 
525
 
 
 
576
 
Expected return on plan assets
 
 
(102
)
 
 
(126
)
Amortization of prior service cost (a)
 
 
26
 
 
 
64
 
Recognized actuarial loss
 
 
565
 
 
 
426
 
Net periodic benefit cost
 
$
1,129
 
 
$
1,074
 
 
 
 
Postretirement Medical and Life Benefits
 
Thirteen weeks ended
 
September 4, 2012
 
August 30, 2011
Service cost
 
$
3
 
 
$
2
 
Interest cost
 
 
15
 
 
 
18
 
Amortization of prior service cost (a)
 
 
(14
)
 
 
(14
)
Recognized actuarial loss
 
 
53
 
 
 
34
 
Net periodic benefit cost
 
$
57
 
 
$
40
 
 
(a)  
Prior service costs are amortized on a straight-line basis over the average remaining service period of employees expected to receive benefits.