Accumulated Other Comprehensive Items - Reclassification Out of Accumulated Other Comprehensive Items (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (231)	$ (250)	$ (462)	$ (556)
Selling, general, and administrative expenses	(31,068)	(31,588)	(63,290)	(64,070)
Total (expense) income before income taxes	12,455	11,868	22,648	19,405
Benefit (provision) for income taxes	(3,914)	(3,870)	(7,182)	(6,222)
Income from Continuing Operations	8,541	7,998	15,466	13,183
Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from Continuing Operations	(198)	(377)	936	(511)
Reclassification out of Accumulated Other Comprehensive Loss [Member] \| Amortization of Prior Service Cost [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general, and administrative expenses	(37)	(38)	(73)	(73)
Reclassification out of Accumulated Other Comprehensive Loss [Member] \| Amortization of Actuarial Losses [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general, and administrative expenses	(145)	(88)	(289)	(176)
Reclassification out of Accumulated Other Comprehensive Loss [Member] \| Pension and Other Post-retirement Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total (expense) income before income taxes	(182)	(126)	(362)	(249)
Benefit (provision) for income taxes	64	44	127	87
Income from Continuing Operations	(118)	(82)	(235)	(162)
Reclassification out of Accumulated Other Comprehensive Loss [Member] \| Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total (expense) income before income taxes	(120)	(362)	1,295	(446)
Benefit (provision) for income taxes	40	67	(124)	97
Income from Continuing Operations	(80)	(295)	1,171	(349)
Reclassification out of Accumulated Other Comprehensive Loss [Member] \| Cash Flow Hedges [Member] \| Interest Rate Swap [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(107)	(84)	(211)	(168)
Reclassification out of Accumulated Other Comprehensive Loss [Member] \| Cash Flow Hedges [Member] \| Forward Currency-Exchange Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general, and administrative expenses	$ (13)	$ (278)	$ 1,506	$ (278)

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the cost of borrowed funds accounted for as interest expense.

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- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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