Annual report pursuant to Section 13 and 15(d)

Fair Value - Narrative (Details)

v3.20.4
Fair Value - Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Oct. 04, 2019
Dec. 31, 2020
Sep. 26, 2020
Jun. 27, 2020
Mar. 28, 2020
Dec. 31, 2019
Sep. 28, 2019
Jun. 29, 2019
Mar. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                        
Impairment charge                   $ 86,312,000 $ 1,610,000 $ 0
Impairment charge to right-of-use                   691,000 1,019,000  
Impairment loss   $ 0 $ 0 $ 12,608,000 $ 74,408,000 $ 11,083,000 $ 0 $ 0 $ 0 87,016,000 11,083,000 0
Intangible asset impairment charge                   0   0
Equity investment impairment                   3,493,000 5,000,000 0
Astronics AeroSat Corporation                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                        
Impairment charge                     1,600,000  
Aerospace                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                        
Impairment charge                   86,312,000 1,610,000  
Intangible asset impairment charge                     6,200,000  
Severance costs                   4,900,000    
Level 3                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                        
Severance costs                   2,600,000 2,800,000  
Recurring Basis | Level 3 | Other Assets                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                        
Financial assets carried at fair value   0       0       0 0  
Recurring Basis | Level 3 | Other Liabilities                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                        
Financial liabilities carried at fair value   0       $ 0       0 0  
Nonrecurring Basis | Level 3                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                        
Impairment charge                     0  
Intangible asset impairment charge                     $ 0 $ 0
Diagnosys Test Systems Limited                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis                        
Potential additional earn-out $ 13,000,000.0                      
Achievement period (in years) 3 years                      
Earn-out achievement benchmark $ 72,000,000.0                      
Contingent consideration, fair value $ 2,500,000                      
Reduced Fair Value   $ 2,200,000               $ 2,200,000