Accumulated Other Comprehensive Items - Reclassification Out of Accumulated Other Comprehensive Items (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (239)	$ (210)	$ (701)	$ (766)
Selling, general, and administrative expenses	(29,200)	(31,872)	(92,490)	(95,942)
Total income before income taxes	12,496	9,983	35,144	29,388
Benefit (provision) for income taxes	(3,782)	(3,246)	(10,964)	(9,468)
Income from Continuing Operations	8,714	6,737	24,180	19,920
Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from Continuing Operations	20	479	956	(32)
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)	(36)	(110)	(109)
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	(144)	(88)	(433)	(264)
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 income before income taxes	(181)	(124)	(543)	(373)
Benefit (provision) for income taxes	64	28	191	115
Income from Continuing Operations	(117)	(96)	(352)	(258)
Reclassification out of Accumulated Other Comprehensive Loss [Member] \| Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total income before income taxes	131	649	1,426	203
Benefit (provision) for income taxes	6	(74)	(118)	23
Income from Continuing Operations	137	575	1,308	226
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	(106)	(83)	(317)	(251)
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]
Revenues	0	31	0	31
Selling, general, and administrative expenses	$ 237	$ 701	$ 1,743	$ 423

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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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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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