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EMPLOYEE BENEFIT PLANS (Components of Net Periodic Postretirement Benefit Cost) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2018
Mar. 25, 2017
Net periodic postretirement benefit cost:    
Service cost $ 34 $ 30
Interest cost 44 38
Amortization of prior service cost 1 25
Net periodic postretirement benefit cost 79 93
Benefit obligations recognized in other comprehensive income:    
Amortization of prior service cost (1) (25)
Net gain (loss) 4 95
Benefit obligations recognized in other comprehensive income 3 70
Total recognized in net periodic benefit cost and other comprehensive income 82 163
Amount recognized in accumulated other comprehensive income, at end of fiscal year:    
Unrecognized prior service cost $ 235 $ 233