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BUSINESS AND ASSET ACQUISITIONS & DIVESTITURES - Narrative (Details)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Sep. 29, 2017
USD ($)
Apr. 30, 2017
USD ($)
Sep. 28, 2018
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
business
Business Acquisitions            
Total aggregate purchase price       $ 1,390 $ 12,796 $ 268,377
Other acquisitions            
Business Acquisitions            
Number of acquisitions completed | business           2
AGM Automotive            
Business Acquisitions            
Total aggregate purchase price   $ 213,700        
AGM Automotive | Customer-related intangibles            
Business Acquisitions            
Intangible assets, weighted average useful life   10 years        
Power Modules from Ericsson            
Business Acquisitions            
Total aggregate purchase price $ 54,700          
Power Modules from Ericsson | Customer-related intangibles            
Business Acquisitions            
Intangible assets, weighted average useful life 10 years          
Finite-lived intangibles $ 16,000          
Power Modules from Ericsson | Licenses and other intangibles            
Business Acquisitions            
Intangible assets, weighted average useful life 8 years          
Finite-lived intangibles $ 17,300          
Multek | Disposed of by Sale            
Business Acquisitions            
Proceeds from divestiture of businesses     $ 267,100      
Net assets transferred     231,400      
Selling costs allocated to goodwill     $ 19,000