Derivatives (Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges - interest rate swaps	$ 94	$ (1,316)
Designated as Hedging Instrument | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges - interest rate swaps	94	(1,316)
Designated as Hedging Instrument | Interest Rate Swap | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges - interest rate swaps	135	1,106
Cash flow hedge gain (loss) to be reclassified during next 12 months, net	123
Not Designated as Hedging Instrument | Interest Rate Swap | Other Nonoperating Income (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedges - interest rate swaps	$ 511	$ 861