Accumulated Other Comprehensive Items, Reclassifications out of AOCI (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013		Dec. 29, 2012		Dec. 31, 2011
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Total reclassifications	$ (982)		$ (1,086)		$ (764)
Pension and Other Post-retirement Plans [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Other Comprehensive Income Loss Reclassification Adjustment On Defined Benefit Plans Included In Net Income Before Tax	(761)		(768)		(539)
Income tax benefit	264		274		192
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(497)		(494)		(347)
Pension and Other Post-retirement Plans [Member] | Amortization of Prior Service Cost [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Amortization of prior service costs (1)	(141)	[1]	(85)	[1]	(72)	[1]
Pension and Other Post-retirement Plans [Member] | Amortization Of Actuarial Losses [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Amortization of actuarial losses (1)	(620)	[1]	(683)	[1]	(467)	[1]
Cash Flow Hedges [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	(527)		(909)		(453)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	(527)		(909)		(453)
Income tax benefit	42		317		36
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(485)		(592)		(417)
Cash Flow Hedges [Member] | Interest Rate Swap [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	(374)	[2]	(513)	[2]	(706)	[2]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	(374)	[2]	(513)	[2]	(706)	[2]
Cash Flow Hedges [Member] | Forward Currency-Exchange Contracts [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	(153)	[2]	(396)	[2]	253	[2]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	$ (153)	[2]	$ (396)	[2]	$ 253	[2]

[1] Included in the computation of net periodic pension costs. See Note 3 for additional information.

[2] See Note 10 for additional information.