Derivatives (Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on interest rate swaps		$ (159)	$ 261	$ (1,264)	$ 1,389
Derivative, Gain (Loss) on Derivative, Net				38
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on interest rate swaps		(159)	261	(1,264)	1,389
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCIL on the effective portion into Income	[1],[2]	(125)	$ (150)	(263)	$ (555)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		$ 799		$ 799

[1] The amount of gain (loss) reclassified from AOCIL is included in interest expense on the Company's consolidated condensed financial statements.

[2] The amount of loss expected to be reclassified from AOCIL into earnings during the next 12 months subsequent to September 28, 2019 is $799.