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Lease Accounting (Tables)
3 Months Ended
Mar. 31, 2021
Leases [Abstract]  
Schedule of Lease Revenues for Operating Leases Our lease revenues for these arrangements (inclusive of fixed and variable consideration) are reflected in the table below:
Three Months Ended
 March 31,
20212020
M/T American Phoenix$3,420 $6,643 
Free State Pipeline (1)
— 1,923 
(1) We sold the Free State pipeline to a subsidiary of Denbury, Inc. ("Denbury") on October 30, 2020.