Transition report pursuant to Rule 13a-10 or 15d-10

PENSION PLANS - Components of Pension Cost (Details)

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PENSION PLANS - Components of Pension Cost (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Retirement Benefits [Abstract]    
Service cost – benefits earned during the period $ 5,912 $ 6,416
Interest cost on projected benefit obligations 14,825 14,815
Expected return on plan assets (25,314) (23,355)
Amortization of deferred amounts:    
Net deferred actuarial losses 8,548 11,382
Deferred prior service costs 647 712
Net periodic pension cost $ 4,618 $ 9,970