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Goodwill - Narrative (Details)
3 Months Ended 12 Months Ended
Mar. 28, 2020
reporting_unit
Dec. 31, 2020
USD ($)
reporting_unit
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Goodwill [Line Items]        
Number of reporting units have goodwill and subject to goodwill impairment test | reporting_unit   5    
Number of reporting units | reporting_unit 8      
Impairment charge   $ 86,312,000 $ 1,610,000 $ 0
Goodwill   58,282,000 144,970,000 $ 124,952,000
Astronics AeroSat Corporation        
Goodwill [Line Items]        
Impairment charge     $ 1,600,000  
PECO Inc        
Goodwill [Line Items]        
Goodwill   $ 20,200,000