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Background, Organization, and Summary of Significant Accounting Policies - Schedule of Estimated Future Amortization of Intangible Assets (Details) - Centuri - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
2021 $ 10,343  
2022 10,255  
2023 10,255  
2024 10,255  
2025 10,211  
Thereafter 88,865  
Net Carrying Amount $ 140,184 $ 150,511