Astronics Corporation Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Narrative (Details)

Long-Term Debt - Narrative (Details)			3 Months Ended	8 Months Ended	12 Months Ended
Long-Term Debt - Narrative (Details)	Dec. 31, 2020 USD ($)	May 04, 2020 USD ($)	Oct. 02, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) fiscal_quarter	Dec. 31, 2019	Jul. 02, 2022	Apr. 02, 2022	Dec. 31, 2021	Jul. 03, 2021	Apr. 03, 2021	May 03, 2020 USD ($)
Debt Instrument
Minimum liquidity		$ 100,000,000
Letter of Credit \| Forecast
Debt Instrument
Covenant, leverage ratio, maximum			6.00				3.75	4.50	5.50
Fifth Amended and Restated Credit Agreement
Debt Instrument
Leverage ratio increase, duration of permitted following acquisition (in fiscal quarters) \| fiscal_quarter					4
Fifth Amended and Restated Credit Agreement \| Maximum
Debt Instrument
Permitted leverage ratio					4.50
Line of Credit \| Revolving Credit Facility
Debt Instrument
Minimum interest coverage ratio on a quarterly basis	6.34			6.34	6.34
Commitment fee percentage					0.35%
Line of credit facility, consent fee percentage					1500.00%
Line of Credit \| Revolving Credit Facility \| Forecast
Debt Instrument
Minimum liquidity			$ 180,000,000.0
Minimum interest coverage ratio on a quarterly basis										1.75	1.50
Line of Credit \| Revolving Credit Facility \| Minimum
Debt Instrument
Commitment fee (percentage)					0.10%
Line of Credit \| Revolving Credit Facility \| LIBOR
Debt Instrument
Interest rate on revolving credit at LIBOR rate	3.25%			2.25%	2.25%
Line of Credit \| Revolving Credit Facility \| LIBOR \| Minimum
Debt Instrument
Interest rate on revolving credit at LIBOR rate					1.00%	1.00%
Line of Credit \| Fifth Amended and Restated Credit Agreement \| Revolving Credit Facility
Debt Instrument
Maximum borrowing capacity												$ 500,000,000
Optional increase in maximum borrowing capacity	$ 150,000,000			$ 150,000,000	$ 150,000,000
Outstanding letters of credit on revolving credit facility	173,000,000.0			173,000,000.0	173,000,000.0
Revolving line of credit	200,900,000			200,900,000	200,900,000
Outstanding letters of credit	1,100,000			1,100,000	1,100,000
Prepayments of lines of credit					$ 165,000,000.0
Line of Credit \| Fifth Amended and Restated Credit Agreement \| Revolving Credit Facility \| Maximum
Debt Instrument
Commitment fee (percentage)					0.20%
Line of Credit \| Fifth Amended and Restated Credit Agreement \| Revolving Credit Facility \| LIBOR \| Minimum
Debt Instrument
Interest rate on revolving credit at LIBOR rate					1.00%
Line of Credit \| Fifth Amended and Restated Credit Agreement \| Revolving Credit Facility \| LIBOR \| Maximum
Debt Instrument
Interest rate on revolving credit at LIBOR rate					1.50%
Line of Credit \| Fifth Amended and Restated Credit Agreement \| Letter of Credit
Debt Instrument
Outstanding letters of credit on revolving credit facility	$ 20,000,000			$ 20,000,000	$ 20,000,000
Line of Credit \| Amended And Restated Credit Agreement \| Revolving Credit Facility
Debt Instrument
Maximum borrowing capacity		$ 375,000,000