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
Oct. 03, 2021
Mar. 28, 2020
Dec. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]            
Goodwill impairment loss $ 0     $ 0 $ 86,312,000 $ 1,600,000
Impairment of long-lived assets held-for-use     $ 9,500,000      
Restructuring charges       798,000 5,327,000 5,190,000
Impairment Charge of Operating Lease ROU Asset       0 691,000  
Severance costs       600,000 2,600,000 2,800,000
Equity investment impairment       0 3,493,000 5,000,000
Aerospace            
Restructuring Cost and Reserve [Line Items]            
Goodwill impairment loss   $ 86,300,000     86,312,000  
Impairment of long-lived assets held-for-use           $ 2,300,000
Restructuring, settlement and impairment provisions     23,600,000 200,000 400,000  
Restructuring charges     $ 5,200,000      
Severance costs       300,000 4,900,000  
Test Systems            
Restructuring Cost and Reserve [Line Items]            
Goodwill impairment loss         $ 0  
Severance costs       $ 300,000