Derivatives (Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance) (Details) - Designated as Hedging Instrument [Member] - Interest Rate Swap [Member] - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in AOCIL on the effective portion of the interest rate swap		$ (1,923)	$ (24)	$ (2,466)	$ (2,003)
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],[3]	(187)	(86)	(453)	(259)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		1,200		1,200
Other Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized on the ineffective portion in Income on interest rate swaps		$ 0	$ 0	$ 0	$ 0

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

[2] The amount of gain (loss) recognized in income on any ineffective portion of interest rate swaps is included in other (income) expense, net on the Company's Consolidated Condensed Statements of Operations.

[3] The amount of loss expected to be reclassified from AOCIL into earnings during the next 12 months subsequent to September 26, 2015 is $1,200.