Accumulated Other Comprehensive Items, Reclassifications out of AOCI (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013		Mar. 31, 2012
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Selling, general, and administrative expenses	$ 26,950		$ 26,143
Interest Expense	165		209
Revenues	76,204		84,113
Total expense before income taxes	7,316		10,275
Total reclassifications, net of tax	5,320		7,076
Reclassification Out Of Accumulated Other Comprehensive Items [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Total reclassifications, net of tax	(377)
Reclassification Out Of Accumulated Other Comprehensive Items [Member] | Pension and Other Post-retirement Plans [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Total expense before income taxes	(207)
Income tax (expense) benefit	72
Total reclassifications, net of tax	(135)
Reclassification Out Of Accumulated Other Comprehensive Items [Member] | Pension and Other Post-retirement Plans [Member] | Amortization of Prior Service Cost [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Selling, general, and administrative expenses	(35)	[1]
Reclassification Out Of Accumulated Other Comprehensive Items [Member] | Pension and Other Post-retirement Plans [Member] | Amortization Of Actuarial Losses [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Selling, general, and administrative expenses	(172)	[1]
Reclassification Out Of Accumulated Other Comprehensive Items [Member] | Cash Flow Hedges [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Total expense before income taxes	(149)
Income tax (expense) benefit	(93)
Total reclassifications, net of tax	(242)
Reclassification Out Of Accumulated Other Comprehensive Items [Member] | Cash Flow Hedges [Member] | Interest Rate Swap [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Interest Expense	(106)	[2]
Reclassification Out Of Accumulated Other Comprehensive Items [Member] | Cash Flow Hedges [Member] | Forward Currency-Exchange Contracts [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Items [Line Items]
Revenues	$ (43)	[2]

[1] Included in the computation of net periodic benefit costs. See Note 7 for additional information.

[2] See Note 9 for additional information.