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Transactions with Related Parties (Schedule of Transactions With Related Parties) (Details) - Affiliated Entity - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
CEO      
Related Party Transaction [Line Items]      
Related party transaction, expenses $ 660 $ 660 $ 660
Poseidon Oil Pipeline Company      
Related Party Transaction [Line Items]      
Related party transaction, revenues 13,846 12,902 12,669 [1]
Related party transaction, expenses $ 965 960 975 [1]
Equity investment, ownership percentage 64.00%    
ANSAC      
Related Party Transaction [Line Items]      
Related party transaction, revenues $ 280,935 236,408 367,133
Related party transaction, expenses $ 1,213 $ 2,460 $ 4,446
[1] We own a 64% interest in Poseidon Oil Pipeline Company, LLC.