Accumulated Other Comprehensive Income (Loss) (Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning	$ (530)	$ (808)
Unrealized gain on interest rate swaps, net of tax	94	(1,316)
Unrealized gain on interest rate swaps, tax	0	0
Reclassification of loss into earnings from interest rate swaps, net of tax	472	1,624
Reclassification of loss into earnings from interest rate swaps, tax	174	343
Reclassification of net actuarial gain into earnings from postretirement benefit plans, net of tax	(6)	(27)
Reclassification of net actuarial gain into earnings from postretirement benefit plans, tax	0	0
Reclassification of prior service credits into earnings from postretirement benefit plans	0	(3)
Reclassification of prior service credits into earnings from postretirement benefit plans, tax	0	0
Balance ending	30	(530)
Interest Rate Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning	(740)	(1,048)
Unrealized gain on interest rate swaps, net of tax	94	(1,316)
Reclassification of loss into earnings from interest rate swaps, net of tax	472	1,624
Balance ending	(174)	(740)
Post-Retirement Liabilities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning	210	240
Reclassification of net actuarial gain into earnings from postretirement benefit plans, net of tax	(6)	(27)
Reclassification of prior service credits into earnings from postretirement benefit plans	0	(3)
Balance ending	$ 204	$ 210