Derivatives (Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on interest rate swaps		$ (1,109)	$ 531	$ 180
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on interest rate swaps		(1,109)	531	180
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion	[1],[2]	(454)	(673)	(1,250)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		841
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Cash Flow Hedge Ineffectiveness		$ 0	$ 0	$ 0

[1] The amount of gain (loss) reclassified from AOCIL is included in interest expense on the Company's Consolidated Statements of Operations.

[2] The amount of loss expected to be reclassified from AOCIL into earnings during the next 12 months subsequent to fiscal 2019 is $841.