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Related Parties - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Lite On Semiconductor          
Related Party Transaction [Line Items]          
Related Party ownership of common stock 15.00%   15.00%    
Related Party Transaction, Description of Transaction     LSC is our largest stockholder, owning approximately 15% of our outstanding Common Stock as of June 30, 2020, and is a member of the Lite-On Group of companies.    
Cash payments to acquire business         $ 437.0
Keylink          
Related Party Transaction [Line Items]          
Related Party ownership of common stock 5.00%   5.00%    
Related Party Transaction, Description of Transaction     Keylink is our 5% joint venture partner in our Shanghai assembly and test facilities.    
Related Party Transaction Consulting Fees from Transactions with Related Party $ 3.8 $ 3.9 $ 6.9 $ 7.8  
Chengdu Ya Guang Electronic Company Limited ("Ya Guang")          
Related Party Transaction [Line Items]          
Related Party Transaction, Description of Transaction     In addition, Chengdu Ya Guang Electronic Company Limited (“Ya Guang”) is our 2% joint venture partner in one of our Chengdu assembly and test facilities and is our 5% joint venture partner in our other Chengdu assembly and test facility    
Chengdu Ya Guang Electronic Company Limited ("Ya Guang") | Chengdu | Assembly and Test Facility One          
Related Party Transaction [Line Items]          
Related Party ownership of common stock 2.00%   2.00%    
Chengdu Ya Guang Electronic Company Limited ("Ya Guang") | Chengdu | Assembly and Test Facility Two          
Related Party Transaction [Line Items]          
Related Party ownership of common stock 5.00%   5.00%