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Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 1 Months Ended
--- | --- | ---
Dec. 28, 2013 Metals Segment [Member] Product Liability and Other Damages [Member] | Dec. 29, 2012 Metals Segment [Member] Product Liability and Other Damages [Member] | Dec. 31, 2011 Metals Segment [Member] Product Liability and Other Damages [Member] | Nov. 30, 2013 Customer Past Due Invoices [Member] Pending Litigation [Member] Metals Segment [Member] | Nov. 30, 2012 Customer Past Due Invoices [Member] Pending Litigation [Member] Specialty Chemicals Segment [Member] | Nov. 30, 2012 Counterclaims [Member] Pending Litigation [Member] Specialty Chemicals Segment [Member]
Product Liability Contingency [Line Items] |  |  |  |  |  |
Claim expense | $ 512 | $ 330 | $ 100 |  |  |
Period of collection efforts |  |  |  |  |  | 12 months
Litigation damages sought |  |  |  | $ 135 | $ 134 | $ 3,000

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