PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Fair Value Assumptions of Plan Assets (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	$ 131,037	$ 123,926	$ 225,451
Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	9,448	26,479
Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	121,589	97,447
Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
All Pension Plans | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	9,448	26,479
All Pension Plans | Cash and cash equivalents | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	9,448	26,479
All Pension Plans | Cash and cash equivalents | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
All Pension Plans | Cash and cash equivalents | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Union Plan | Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	70
PSAs for the Union Plan | Fixed income securities | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Union Plan | Fixed income securities | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	70
PSAs for the Union Plan | Fixed income securities | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs and CCTs for the GK Pension Plan | Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	3,152
PSAs and CCTs for the GK Pension Plan | Fixed income securities | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs and CCTs for the GK Pension Plan | Fixed income securities | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	3,152
PSAs and CCTs for the GK Pension Plan | Fixed income securities | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	40,562	29,715
PSAs for the Europe Plans | Fixed income securities | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | Fixed income securities | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	40,562	29,715
PSAs for the Europe Plans | Fixed income securities | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | Large U.S. equity funds
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	13,279	11,761
PSAs for the Europe Plans | Large U.S. equity funds | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | Large U.S. equity funds | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	13,279	11,761
PSAs for the Europe Plans | Large U.S. equity funds | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | International equity funds
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	17,157	25,575
PSAs for the Europe Plans | International equity funds | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | International equity funds | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	17,157	25,575
PSAs for the Europe Plans | International equity funds | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | Real estate
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	11,464	15,442
PSAs for the Europe Plans | Real estate | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | Real estate | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	11,464	15,442
PSAs for the Europe Plans | Real estate | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | Liability driven investments
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	39,127	11,732
PSAs for the Europe Plans | Liability driven investments | Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	0	0
PSAs for the Europe Plans | Liability driven investments | Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	39,127	11,732
PSAs for the Europe Plans | Liability driven investments | Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Total assets	$ 0	$ 0