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Discontinued Operations (Details) - SISD - Discontinued Operations, Disposed of by Sale - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jul. 05, 2015	Jul. 03, 2016	Jul. 05, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit) on discontinued operations	$ (149)	$ 103	$ (149)	$ 626
Net income (loss) from discontinued operations	(255)	$ 198	$ (255)	$ 1,228
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
Damages awarded, reimbursement of legal fees	45
Net settlement	281
Legal fees	123
Income tax expense (benefit) on discontinued operations	(149)
Net income (loss) from discontinued operations	$ (255)

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