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PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Pension
Employee benefits
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
Other Postretirement Benefits Plan
Employee benefits
Net periodic cost	$ 0	$ 0

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- Definition

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