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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]  
Property, Plant and Equipment, Useful Lives
Depreciation is computed using the straight-line method over the following estimated useful lives:
Process units and equipment  
5-25 years
Pipeline and equipment  
5-25 years
Buildings  
25 years
Computers, furniture and fixtures  
3-7 years
Leasehold improvements  
20 years
Railcars
50 years