Derivatives (Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance) (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
		Mar. 16, 2022	Jul. 01, 2023	Jun. 25, 2022	Jul. 01, 2023	Jun. 25, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges - interest rate swaps	[1]		$ 0	$ 0	$ 0	$ (210)
Net of tax, that had been deferred in AOCIL were reclassified into interest expense			0	0	0	177
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Payment to terminate the swap agreements		$ 73
Net of tax, that had been deferred in AOCIL were reclassified into interest expense		$ 177
Designated as Hedging Instrument | Interest Rate Swap | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges - interest rate swaps			0	0	0	(7)
Designated as Hedging Instrument | Interest Rate Swap | Other Nonoperating Income (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges - interest rate swaps			$ 0	$ 0	$ 0	$ 210

[1] Amounts for postretirement plans reclassified from accumulated other comprehensive income to net loss were included in selling and administrative expenses in the Company's consolidated condensed statements of operations.