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Goodwill and Other Intangible Assets - Future Amortization Expense of Other Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2021 $ 13,021  
2022 12,949  
2023 12,892  
2024 12,656  
2025 12,656  
Thereafter 60,570  
Net Carrying Amount 124,744 $ 138,362
Electronic Systems    
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2021 9,288  
2022 9,288  
2023 9,288  
2024 9,288  
2025 9,288  
Thereafter 37,202  
Net Carrying Amount 83,642 93,418
Structural Systems    
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2021 3,733  
2022 3,661  
2023 3,604  
2024 3,368  
2025 3,368  
Thereafter 23,368  
Net Carrying Amount $ 41,102 $ 44,944