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PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS (Tables)
 3 Months Ended
Mar. 30, 2019
Retirement Benefits [Abstract]  
Schedule of Net Periodic Cost
The following table provides the components of net periodic cost for the Company’s pension, deferred compensation and executive supplemental life insurance retirement plans:
 
Three Months Ended
 
March 30, 2019
 
March 31, 2018
 
(in thousands)
Service cost
$
630


$
846

Interest cost
2,875


2,833

Expected return on plan assets
(3,235
)

(3,877
)
Amortization of prior service cost (credit)
91


(181
)
Amortization of net loss
489


645

Net periodic cost
$
850

 
$
266