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Discontinued Operations - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2014 | Dec. 31, 2012 | Dec. 31, 2011
NI Industries business [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from Sale of Productive Assets |  | $ 6.7 |  |  |  |
Precision Tool Cutting and Specialty Fittings Line of Business [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset |  |  |  |  |  | $ 2.5
Proceeds from Divestiture of Businesses |  |  | $ 1.0 | $ 0.0 |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  |  | $ 1.3 |
Specialty Laminates, Jacketings and Insulation Tapes Line of Business [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Restructuring Charges | $ 1.8 |  |  |  |  |

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