Employee Benefit Plans (Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Service cost	$ 8	$ 8
Interest cost	16	17
Amortization of prior service credits	0	0
Recognized net actuarial gains	(22)	(25)
Net periodic benefit cost (credit)	$ 2	$ 0