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PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Pension
Employee benefits
Service cost	$ 757	$ 969	$ 1,387	$ 1,815
Interest cost	2,875	2,656	5,750	5,489
Expected return on plan assets	(3,235)	(4,012)	(6,470)	(7,889)
Amortization of prior service cost (credit)	91	(90)	182	(271)
Amortization of net loss	488	886	977	1,531
Net periodic cost	976	409	1,826	675
Other Postretirement Benefits Plan
Employee benefits
Net periodic cost	$ 0	$ 0	$ 0	$ 0

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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