Legal Proceedings (Details) (USD $)	6 Months Ended
Jul. 03, 2011
Asbestos Cases [Member]
Loss Contingencies [Line Items]
Number of pending cases	25
Number of cases dismissed	8
Aggregate cost of legal defense for pending silica and asbestos cases	$ 100,000
Silica Cases [Member]
Loss Contingencies [Line Items]
Number of pending cases	305
Number of cases dismissed	1,160
Administrative Consent Order For Contamination Associated with Historic Use of PCBs [Member]
Environmental Matters [Abstract]
Location of plant	Canaan, Connecticut
Estimated accrued remediation cost	400,000
Administrative Consent Order For Installation of Groundwater Contamination System [Member]
Environmental Matters [Abstract]
Location of plant	Adams, Massachusetts
Estimated accrued remediation cost	400,000
Estimated cost of wastewater treatment upgrades, lower range	6,000,000
Estimated cost of wastewater treatment upgrades, upper range	$ 8,000,000

Low-end of the range estimate of the cost of wastewater treatment facilities upgrade at the entity's Adams, Massachusetts plant.

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High-end of the range estimate of the cost of wastewater treatment facilities upgrade at the entity's Adams, Massachusetts plant.

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The number of claims dismissed during the period.

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859

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-Publisher AICPA
-Name Statement of Position (SOP)
-Number 96-1
-Paragraph 161
-Subparagraph a
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The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

+ References

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-Publisher FASB
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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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The total amount of pending claims pertaining to a loss contingency accrual as of the balance sheet date.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 9, 10, 11, 12
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Name of the individual site or other grouping of the contingency.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
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