Annual report pursuant to Section 13 and 15(d)

Goodwill - Summary of Changes in Carrying Amount of Goodwill (Details)

v3.20.4
Goodwill - Summary of Changes in Carrying Amount of Goodwill (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2020
Goodwill        
Goodwill, Beginning Balance $ 144,970,000 $ 124,952,000    
Acquisitions and Divestitures (298,000) 21,670,000    
Impairment Charge (86,312,000) (1,610,000) $ 0  
Foreign Currency Translations and Other (78,000) (42,000)    
Goodwill, Ending Balance 58,282,000 144,970,000 124,952,000  
Goodwill, Gross       $ 178,983,000
Accumulated Impairment Losses       (120,701,000)
Goodwill, Net 58,282,000 144,970,000 124,952,000 58,282,000
Aerospace        
Goodwill        
Goodwill, Beginning Balance 123,038,000 124,952,000    
Acquisitions and Divestitures 0 (262,000)    
Impairment Charge (86,312,000) (1,610,000)    
Foreign Currency Translations and Other (78,000) (42,000)    
Goodwill, Ending Balance 36,648,000 123,038,000 124,952,000  
Goodwill, Gross       157,349,000
Accumulated Impairment Losses       (120,701,000)
Goodwill, Net 36,648,000 123,038,000 124,952,000 36,648,000
Test Systems        
Goodwill        
Goodwill, Beginning Balance 21,932,000 0    
Acquisitions and Divestitures (298,000) 21,932,000    
Impairment Charge 0 0    
Foreign Currency Translations and Other 0 0    
Goodwill, Ending Balance 21,634,000 21,932,000 0  
Goodwill, Gross       21,634,000
Accumulated Impairment Losses       0
Goodwill, Net $ 21,634,000 $ 21,932,000 $ 0 $ 21,634,000