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Discontinued Operations (Details) - SISD - Discontinued Operations, Disposed of by Sale - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017 | Oct. 02, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Income tax expense (benefit) on discontinued operations | $ 0 | $ 0 | $ 0 | $ (149,000)
Net income (loss) from discontinued operations | 0 | $ 0 | $ 0 | $ (255,000)
AMETEK Matter | Guarantee Obligations | Settled Litigation |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Damages awarded, refund of product purchase price | 326,000 |  |  |
Damages awarded, reimbursement of legal fees | 45,000 |  |  |
Net settlement | 281,000 |  |  |
Legal fees | 123,000 |  |  |
Income tax expense (benefit) on discontinued operations | (149,000) |  |  |
Net income (loss) from discontinued operations | $ (255,000) |  |  |

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