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Summary of Significant Accounting Policies - Disaggregation Of Revenue (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Product Information [Line Items]    
Revenue from Contract with Customer, Excluding Assessed Tax $ 346,935 $ 248,811
Automotive [Member]    
Product Information [Line Items]    
Revenue from Contract with Customer, Excluding Assessed Tax 283,236 212,300
Other [Member]    
Product Information [Line Items]    
Revenue from Contract with Customer, Excluding Assessed Tax $ 63,699 $ 36,511