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Long-Term Debt 2 (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Annual maturities of all long-term debt, including capitalized leases    
Total $ 444,271 $ 284,699
GSWC    
Annual maturities of all long-term debt, including capitalized leases    
2021 358  
2022 382  
2023 406  
2024 430  
2025 449  
Thereafter 442,246  
Total $ 444,271 $ 284,699