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Overview (Details)
6 Months Ended
Jun. 30, 2023
refinery
segment
Jun. 01, 2023
terminal
Current assets    
Operating segments | segment 3  
Number of owned and operated refineries | refinery 4  
Number of wholly owned refined product terminals   4
Number of refined product terminals owned in joint venture   3
Yellowstone Energy Limited Partnership | Billings Acquisition    
Current assets    
Ownership interest 65.00% 65.00%
Yellowstone Pipeline Company    
Current assets    
Ownership interest 40.00% 40.00%
Yellowstone Pipeline Company | Billings Acquisition    
Current assets    
Ownership interest   40.00%
Laramie Energy Company    
Current assets    
Ownership interest 46.00%