DEFINED BENEFIT RETIREMENT PLAN (Details 2) £ in Thousands, $ in Thousands	12 Months Ended
	Dec. 25, 2021 USD ($)	Dec. 25, 2021 GBP (£)	Dec. 26, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Limit on employer contributions per annum	$ 17,765	£ 13,100
Administrative costs of the Plan	1,763	£ 1,300
Plan assets	761,170		$ 741,650
Estimated Fair value
Defined Benefit Plan Disclosure [Line Items]
Plan assets	14,000		31,935
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Plan assets	14,000		31,935
Fair Value Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 747,170		709,715
Mutual funds and diversified growth funds
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	50.00%
Temporary cash investments | Estimated Fair value
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 14,000		31,935
Temporary cash investments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Plan assets	14,000		31,935
Corporate stock | Fair Value Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Plan assets	212,730		309,987
Leveraged inflation-linked gilt funds | Fair Value Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Plan assets	283,288		171,013
Corporate bonds | Fair Value Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Plan assets	107,945		115,577
Secured income asset funds | Fair Value Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 143,207		$ 113,138