Astronics Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Acquisition and Divestiture Activities - Narrative (Details)

Acquisition and Divestiture Activities - Narrative (Details)					3 Months Ended		9 Months Ended
	Oct. 04, 2019 USD ($)	Jul. 12, 2019 USD ($)	Jul. 01, 2019 USD ($)	Feb. 13, 2019 USD ($)	Sep. 28, 2019 USD ($)	Mar. 30, 2019 USD ($)	Sep. 26, 2020 USD ($) element	Sep. 28, 2019 USD ($)	Dec. 31, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Acquisition of Business, Net of Cash Acquired							$ 0	$ 21,785,000
Number of elements for contingent earnouts \| element							2
Proceeds on Sale of Assets							$ 1,600,000	$ 0
Freedom Communication Technologies, Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Acquisition of Business, Net of Cash Acquired			$ 21,800,000
Cash acquired			$ 600,000
Diagnosys
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash paid to acquire stock	$ 7,000,000.0
Fair value of contingent purchase consideration	2,500,000
Potential additional earn-out	$ 13,000,000.0
Achievement period	3 years
Earn-out achievement benchmark	$ 72,000,000.0
Disposed by Sale \| Airfield Lighting Product Line Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds on Sale of Assets		$ 1,000,000.0
Percentage of revenue (as a percentage)		1.00%
Loss on sale					$ 1,300,000
Held for Sale \| First Earnout
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Maximum total earnout proceeds							35,000,000.0
Held for Sale \| Second Earnout
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Maximum total earnout proceeds							$ 0
Held for Sale \| Test Systems Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment classified as held for sale									$ 1,500,000
Divestiture by Sale \| Test Systems Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total cash proceeds of divesture				$ 103,800,000
Gain on sale, net of tax						$ 80,100,000
Income taxes from divesture						$ 19,700,000