DERIVATIVE FINANCIAL INSTRUMENTS (Narrative) (Details)	9 Months Ended	12 Months Ended
	Sep. 26, 2020 USD ($) derivative_instrument	Dec. 28, 2019 USD ($)
Derivative [Line Items]
Derivative gains, net of tax	$ (500,000)	$ 1,300,000
Net AOCI hedging component	1,500,000
Net current deferred losses expected to be realized in the next twelve months	4,000,000.0
Receive-variable/pay-fixed interest rate swap
Derivative [Line Items]
Notional amount of instrument	88,400,000
Foreign currency swap
Derivative [Line Items]
Notional amount of instrument	$ 250,000,000.0
Number of derivative instruments | derivative_instrument	2