PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Interest cost	$ 5,763	$ 8,102	$ 6,673
Estimated return on plan assets	(10,562)	(13,071)	(6,921)
Settlement loss	2,313	3,371	3,538
Expenses paid from assets	425	735	(62)
Amortization of net loss	2,257	1,503	1,313
Amortization of past service cost	19	0	0
Net cost	215	640	4,541
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Interest cost	18	36	52
Estimated return on plan assets	0	0	0
Settlement loss	21	7	7
Expenses paid from assets	0	0	0
Amortization of net loss	2	0	0
Net cost	$ 41	$ 43	$ 59