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EMPLOYEE BENEFIT PLANS (Components of Net Periodic Postretirement Benefit Cost) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 27, 2021
Mar. 28, 2020
Net periodic post-retirement benefit cost:    
Service cost $ 84 $ 77
Interest cost 48 48
Amortization of prior service cost 1 1
Net periodic postretirement benefit cost 133 126
Benefit obligations recognized in other comprehensive income:    
Amortization of prior service cost (1) (1)
Net gain 233 113
Benefit obligations recognized in other comprehensive income 232 112
Total recognized in net periodic benefit cost and other comprehensive income 365 238
Amount recognized in accumulated other comprehensive income, at end of fiscal year:    
Unrecognized prior service cost $ 739 $ 518