Annual report pursuant to Section 13 and 15(d)

Impairments, Restructuring and Other Charges - Narrative (Details)

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Impairments, Restructuring and Other Charges - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]        
Goodwill impairment loss   $ 86,312,000 $ 1,610,000 $ 0
Impairment Charge of Operating Lease ROU Asset   691,000 1,019,000  
Equity investment impairment   3,493,000 5,000,000 $ 0
Aerospace        
Restructuring Cost and Reserve [Line Items]        
Goodwill impairment loss   86,312,000 1,610,000  
Restructuring, settlement and impairment provisions $ 28,800,000 400,000    
Severance costs   $ 4,900,000    
Astronics AeroSat Corporation        
Restructuring Cost and Reserve [Line Items]        
Goodwill impairment loss     $ 1,600,000